/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:30:14,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:30:14,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:30:14,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:30:14,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:30:14,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:30:14,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:30:14,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:30:14,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:30:14,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:30:14,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:30:14,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:30:14,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:30:14,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:30:14,643 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:30:14,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:30:14,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:30:14,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:30:14,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:30:14,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:30:14,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:14,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:30:14,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:30:14,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:30:14,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:30:14,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:30:14,921 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:30:14,922 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:30:14,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2021-06-05 14:30:14,922 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2021-06-05 14:30:14,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:30:14,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:30:14,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:14,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:30:14,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:30:14,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:14,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:14,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:14,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:30:14,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:30:14,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:30:14,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:14,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:14,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:14,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:30:15,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:30:15,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:30:15,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:30:15,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:15,088 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:30:15,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:30:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:30:15,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:30:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:30:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:30:15,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:30:15,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:30:15,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:30:15,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:30:15,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:30:15,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:30:15,095 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:30:15,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:30:15,600 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 14:30:15,603 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:15 BoogieIcfgContainer [2021-06-05 14:30:15,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:30:15,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:30:15,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:30:15,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:30:15,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/2) ... [2021-06-05 14:30:15,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe8fcf7 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:30:15, skipping insertion in model container [2021-06-05 14:30:15,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:15" (2/2) ... [2021-06-05 14:30:15,609 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-06-05 14:30:15,614 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:30:15,614 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:30:15,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:30:15,615 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:30:15,648 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:30:15,662 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:30:15,686 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:30:15,687 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:30:15,687 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:30:15,687 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:30:15,687 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:30:15,687 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:30:15,687 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:30:15,687 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:30:15,692 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 14:30:15,703 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:15,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,710 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-05 14:30:15,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782002036] [2021-06-05 14:30:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:15,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:15,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782002036] [2021-06-05 14:30:15,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782002036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:15,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:15,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:30:15,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041714046] [2021-06-05 14:30:15,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:30:15,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:15,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:30:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:30:15,886 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:15,920 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-06-05 14:30:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:30:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:15,928 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:30:15,929 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:30:15,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:30:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-06-05 14:30:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-05 14:30:15,959 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-05 14:30:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:15,959 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-05 14:30:15,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-05 14:30:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:15,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,961 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:30:15,962 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1970777821, now seen corresponding path program 1 times [2021-06-05 14:30:15,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057357844] [2021-06-05 14:30:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057357844] [2021-06-05 14:30:16,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057357844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:16,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915678531] [2021-06-05 14:30:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915678531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:16,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-06-05 14:30:16,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153656030] [2021-06-05 14:30:16,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:16,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:16,323 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,468 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-06-05 14:30:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:16,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,476 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:30:16,476 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:30:16,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:30:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-06-05 14:30:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.8742138364779874) internal successors, (457), 159 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-06-05 14:30:16,492 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-06-05 14:30:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,493 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-06-05 14:30:16,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-06-05 14:30:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:16,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:30:16,701 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -92460565, now seen corresponding path program 2 times [2021-06-05 14:30:16,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708954554] [2021-06-05 14:30:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708954554] [2021-06-05 14:30:16,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708954554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:16,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294292917] [2021-06-05 14:30:16,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:16,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-06-05 14:30:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:30:16,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:30:16,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294292917] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:16,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-06-05 14:30:16,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690288460] [2021-06-05 14:30:16,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:30:16,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:30:16,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:16,863 INFO L87 Difference]: Start difference. First operand 160 states and 457 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,929 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-06-05 14:30:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:30:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,931 INFO L225 Difference]: With dead ends: 252 [2021-06-05 14:30:16,931 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:30:16,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:30:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-06-05 14:30:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-05 14:30:16,938 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-06-05 14:30:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,938 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-05 14:30:16,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-05 14:30:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:16,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,158 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1791011915, now seen corresponding path program 1 times [2021-06-05 14:30:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45095706] [2021-06-05 14:30:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45095706] [2021-06-05 14:30:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45095706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420318439] [2021-06-05 14:30:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:17,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:17,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:17,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:17,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:17,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:17,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 14:30:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420318439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:17,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:17,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:30:17,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11457401] [2021-06-05 14:30:17,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:17,867 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,686 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-05 14:30:19,169 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 14:30:19,452 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 14:30:19,654 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 14:30:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,934 INFO L93 Difference]: Finished difference Result 482 states and 1415 transitions. [2021-06-05 14:30:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:30:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,937 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:30:19,937 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:30:19,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1843.9ms TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:30:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:30:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 204. [2021-06-05 14:30:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9655172413793105) internal successors, (602), 203 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2021-06-05 14:30:19,946 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2021-06-05 14:30:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,946 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2021-06-05 14:30:19,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2021-06-05 14:30:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:19,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:20,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:20,157 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-06-05 14:30:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:20,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250518767] [2021-06-05 14:30:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:20,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250518767] [2021-06-05 14:30:20,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250518767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:20,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972573074] [2021-06-05 14:30:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:20,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:20,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:20,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:20,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:20,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,476 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-06-05 14:30:20,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:20,478 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-06-05 14:30:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972573074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:20,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:20,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:20,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938257754] [2021-06-05 14:30:20,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:20,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:20,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:20,556 INFO L87 Difference]: Start difference. First operand 204 states and 602 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:21,052 INFO L93 Difference]: Finished difference Result 366 states and 1056 transitions. [2021-06-05 14:30:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:21,054 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:30:21,054 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 14:30:21,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 14:30:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 219. [2021-06-05 14:30:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.0137614678899083) internal successors, (657), 218 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 657 transitions. [2021-06-05 14:30:21,067 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 657 transitions. Word has length 19 [2021-06-05 14:30:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:21,067 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 657 transitions. [2021-06-05 14:30:21,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 657 transitions. [2021-06-05 14:30:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:21,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:21,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:21,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:21,269 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-06-05 14:30:21,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:21,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639622082] [2021-06-05 14:30:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:21,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639622082] [2021-06-05 14:30:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639622082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187448070] [2021-06-05 14:30:21,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:21,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:21,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:30:21,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:21,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:21,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:21,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:21,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:21,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:21,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:21,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:21,592 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:21,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,692 INFO L628 ElimStorePlain]: treesize reduction 100, result has 51.7 percent of original size [2021-06-05 14:30:21,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:30:21,694 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:389, output treesize:107 [2021-06-05 14:30:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187448070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:21,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:21,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091101034] [2021-06-05 14:30:21,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:21,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:21,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:21,867 INFO L87 Difference]: Start difference. First operand 219 states and 657 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,258 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 14:30:22,374 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 14:30:22,543 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 14:30:22,675 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:30:22,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:22,751 INFO L93 Difference]: Finished difference Result 477 states and 1330 transitions. [2021-06-05 14:30:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:22,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:22,753 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:30:22,753 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:30:22,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:30:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 224. [2021-06-05 14:30:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.0582959641255605) internal successors, (682), 223 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 682 transitions. [2021-06-05 14:30:22,761 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 682 transitions. Word has length 19 [2021-06-05 14:30:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:22,761 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 682 transitions. [2021-06-05 14:30:22,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 682 transitions. [2021-06-05 14:30:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:22,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:22,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 14:30:22,977 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-06-05 14:30:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293233262] [2021-06-05 14:30:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293233262] [2021-06-05 14:30:23,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293233262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712065231] [2021-06-05 14:30:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:23,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:23,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:23,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:23,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:23,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:23,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:23,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:23,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:23,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:23,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,322 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-06-05 14:30:23,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:23,324 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:257, output treesize:79 [2021-06-05 14:30:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712065231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:23,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:30:23,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843459161] [2021-06-05 14:30:23,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:23,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:23,451 INFO L87 Difference]: Start difference. First operand 224 states and 682 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,876 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 14:30:24,053 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 14:30:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,175 INFO L93 Difference]: Finished difference Result 454 states and 1282 transitions. [2021-06-05 14:30:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,177 INFO L225 Difference]: With dead ends: 454 [2021-06-05 14:30:24,177 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 14:30:24,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 14:30:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 229. [2021-06-05 14:30:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.0789473684210527) internal successors, (702), 228 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 702 transitions. [2021-06-05 14:30:24,183 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 702 transitions. Word has length 19 [2021-06-05 14:30:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,183 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 702 transitions. [2021-06-05 14:30:24,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 702 transitions. [2021-06-05 14:30:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:24,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,184 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:24,403 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-06-05 14:30:24,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864559617] [2021-06-05 14:30:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864559617] [2021-06-05 14:30:24,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864559617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150175374] [2021-06-05 14:30:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:24,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:24,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:24,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:24,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:24,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:24,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,699 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 14:30:24,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:24,700 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 14:30:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150175374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:24,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:30:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276845774] [2021-06-05 14:30:24,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:24,775 INFO L87 Difference]: Start difference. First operand 229 states and 702 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,020 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:30:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,416 INFO L93 Difference]: Finished difference Result 471 states and 1333 transitions. [2021-06-05 14:30:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,417 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:30:25,418 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:30:25,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 625.4ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:30:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 249. [2021-06-05 14:30:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.092741935483871) internal successors, (767), 248 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 767 transitions. [2021-06-05 14:30:25,423 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 767 transitions. Word has length 19 [2021-06-05 14:30:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,423 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 767 transitions. [2021-06-05 14:30:25,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 767 transitions. [2021-06-05 14:30:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:25,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:25,641 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-06-05 14:30:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742354970] [2021-06-05 14:30:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742354970] [2021-06-05 14:30:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742354970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:25,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792640109] [2021-06-05 14:30:25,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:25,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:25,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:25,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:25,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:25,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:25,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:25,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:25,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:25,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,988 INFO L628 ElimStorePlain]: treesize reduction 32, result has 54.3 percent of original size [2021-06-05 14:30:25,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:25,989 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-06-05 14:30:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792640109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:26,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:26,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:30:26,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664731543] [2021-06-05 14:30:26,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:26,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:26,062 INFO L87 Difference]: Start difference. First operand 249 states and 767 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,513 INFO L93 Difference]: Finished difference Result 349 states and 1061 transitions. [2021-06-05 14:30:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,514 INFO L225 Difference]: With dead ends: 349 [2021-06-05 14:30:26,514 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:30:26,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:30:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2021-06-05 14:30:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.110671936758893) internal successors, (787), 253 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 787 transitions. [2021-06-05 14:30:26,520 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 787 transitions. Word has length 19 [2021-06-05 14:30:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,520 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 787 transitions. [2021-06-05 14:30:26,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 787 transitions. [2021-06-05 14:30:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:26,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 14:30:26,741 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-06-05 14:30:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68335670] [2021-06-05 14:30:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68335670] [2021-06-05 14:30:26,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68335670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:26,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74825944] [2021-06-05 14:30:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:26,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:26,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:26,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:26,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:26,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:26,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:26,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:27,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:27,004 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:27,007 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:30:27,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:27,013 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:27,016 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,069 INFO L628 ElimStorePlain]: treesize reduction 48, result has 59.3 percent of original size [2021-06-05 14:30:27,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:27,070 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:409, output treesize:70 [2021-06-05 14:30:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74825944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:27,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:30:27,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598341917] [2021-06-05 14:30:27,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:27,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:27,266 INFO L87 Difference]: Start difference. First operand 254 states and 787 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,227 INFO L93 Difference]: Finished difference Result 515 states and 1500 transitions. [2021-06-05 14:30:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:30:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,229 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:30:28,230 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:30:28,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:30:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:30:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 269. [2021-06-05 14:30:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.1977611940298507) internal successors, (857), 268 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 857 transitions. [2021-06-05 14:30:28,236 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 857 transitions. Word has length 19 [2021-06-05 14:30:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,236 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 857 transitions. [2021-06-05 14:30:28,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 857 transitions. [2021-06-05 14:30:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:28,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,453 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-06-05 14:30:28,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821028415] [2021-06-05 14:30:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821028415] [2021-06-05 14:30:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821028415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73144093] [2021-06-05 14:30:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:28,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:28,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:28,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:28,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:28,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:28,728 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:28,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:30:28,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:28,741 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:28,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:28,749 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:28,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,817 INFO L628 ElimStorePlain]: treesize reduction 110, result has 42.1 percent of original size [2021-06-05 14:30:28,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:28,818 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:386, output treesize:80 [2021-06-05 14:30:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73144093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 14:30:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804614960] [2021-06-05 14:30:29,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:29,040 INFO L87 Difference]: Start difference. First operand 269 states and 857 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,295 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-05 14:30:29,497 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 14:30:29,743 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:30:29,888 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 14:30:30,028 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 14:30:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:30,035 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2021-06-05 14:30:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:30,037 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:30:30,037 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 14:30:30,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 966.5ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 14:30:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 274. [2021-06-05 14:30:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.2124542124542126) internal successors, (877), 273 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 877 transitions. [2021-06-05 14:30:30,044 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 877 transitions. Word has length 19 [2021-06-05 14:30:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:30,044 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 877 transitions. [2021-06-05 14:30:30,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 877 transitions. [2021-06-05 14:30:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:30,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:30,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:30,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,265 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash -709814267, now seen corresponding path program 9 times [2021-06-05 14:30:30,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:30,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678613688] [2021-06-05 14:30:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678613688] [2021-06-05 14:30:30,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678613688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954083108] [2021-06-05 14:30:30,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:30,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:30,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:30,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:30,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:30,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:30,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:30,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:30,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:30,499 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:30,504 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:30,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:30,511 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:30,514 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:30,517 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,579 INFO L628 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2021-06-05 14:30:30,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:30,580 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:382, output treesize:58 [2021-06-05 14:30:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954083108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:30,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 14:30:30,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496976649] [2021-06-05 14:30:30,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:30,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:30,709 INFO L87 Difference]: Start difference. First operand 274 states and 877 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,387 INFO L93 Difference]: Finished difference Result 434 states and 1279 transitions. [2021-06-05 14:30:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,389 INFO L225 Difference]: With dead ends: 434 [2021-06-05 14:30:31,389 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:30:31,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:30:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2021-06-05 14:30:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1941391941391943) internal successors, (872), 273 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 872 transitions. [2021-06-05 14:30:31,394 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 872 transitions. Word has length 19 [2021-06-05 14:30:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,394 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 872 transitions. [2021-06-05 14:30:31,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 872 transitions. [2021-06-05 14:30:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:31,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,609 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-06-05 14:30:31,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619733738] [2021-06-05 14:30:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619733738] [2021-06-05 14:30:31,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619733738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23655953] [2021-06-05 14:30:31,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:31,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:31,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:30:31,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:31,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:31,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:31,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:31,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:31,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:31,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:31,864 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:31,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:31,870 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,934 INFO L628 ElimStorePlain]: treesize reduction 100, result has 44.1 percent of original size [2021-06-05 14:30:31,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:31,935 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-06-05 14:30:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23655953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:32,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:30:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434733465] [2021-06-05 14:30:32,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:32,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:32,171 INFO L87 Difference]: Start difference. First operand 274 states and 872 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,467 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 14:30:32,702 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 14:30:32,971 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 14:30:33,138 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 14:30:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,164 INFO L93 Difference]: Finished difference Result 634 states and 1845 transitions. [2021-06-05 14:30:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,166 INFO L225 Difference]: With dead ends: 634 [2021-06-05 14:30:33,166 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:30:33,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1021.4ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:30:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 284. [2021-06-05 14:30:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.222614840989399) internal successors, (912), 283 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 912 transitions. [2021-06-05 14:30:33,172 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 912 transitions. Word has length 19 [2021-06-05 14:30:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 912 transitions. [2021-06-05 14:30:33,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 912 transitions. [2021-06-05 14:30:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:33,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,389 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-06-05 14:30:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809423900] [2021-06-05 14:30:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809423900] [2021-06-05 14:30:33,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809423900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276508367] [2021-06-05 14:30:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:33,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:33,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:33,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:33,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:33,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:33,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,717 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 14:30:33,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:33,718 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:133, output treesize:49 [2021-06-05 14:30:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276508367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:33,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:30:33,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111247580] [2021-06-05 14:30:33,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:33,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:33,801 INFO L87 Difference]: Start difference. First operand 284 states and 912 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,539 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 14:30:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,593 INFO L93 Difference]: Finished difference Result 612 states and 1763 transitions. [2021-06-05 14:30:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,595 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:30:34,595 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:30:34,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:30:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 294. [2021-06-05 14:30:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.249146757679181) internal successors, (952), 293 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 952 transitions. [2021-06-05 14:30:34,602 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 952 transitions. Word has length 19 [2021-06-05 14:30:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,602 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 952 transitions. [2021-06-05 14:30:34,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 952 transitions. [2021-06-05 14:30:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:34,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 14:30:34,817 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-06-05 14:30:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922096272] [2021-06-05 14:30:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922096272] [2021-06-05 14:30:34,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922096272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535997032] [2021-06-05 14:30:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:34,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:35,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:30:35,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:30:35,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:35,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:35,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:35,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:35,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:35,063 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,102 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-06-05 14:30:35,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:35,103 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-06-05 14:30:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535997032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:35,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:30:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243730643] [2021-06-05 14:30:35,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:35,237 INFO L87 Difference]: Start difference. First operand 294 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,226 INFO L93 Difference]: Finished difference Result 533 states and 1561 transitions. [2021-06-05 14:30:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,228 INFO L225 Difference]: With dead ends: 533 [2021-06-05 14:30:36,228 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 14:30:36,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 904.3ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:30:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 14:30:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2021-06-05 14:30:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.2320819112627985) internal successors, (947), 293 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 947 transitions. [2021-06-05 14:30:36,234 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 947 transitions. Word has length 19 [2021-06-05 14:30:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,234 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 947 transitions. [2021-06-05 14:30:36,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 947 transitions. [2021-06-05 14:30:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:36,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,235 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,455 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1346948354, now seen corresponding path program 13 times [2021-06-05 14:30:36,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338742644] [2021-06-05 14:30:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338742644] [2021-06-05 14:30:36,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338742644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034503699] [2021-06-05 14:30:36,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:36,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:36,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:36,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,641 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:30:36,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:36,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:30:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034503699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:36,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:30:36,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360020073] [2021-06-05 14:30:36,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:36,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:36,689 INFO L87 Difference]: Start difference. First operand 294 states and 947 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,932 INFO L93 Difference]: Finished difference Result 486 states and 1487 transitions. [2021-06-05 14:30:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,934 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:30:36,934 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 14:30:36,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 14:30:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 283. [2021-06-05 14:30:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.2872340425531914) internal successors, (927), 282 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 927 transitions. [2021-06-05 14:30:36,939 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 927 transitions. Word has length 20 [2021-06-05 14:30:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,940 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 927 transitions. [2021-06-05 14:30:36,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 927 transitions. [2021-06-05 14:30:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:36,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,940 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 14:30:37,157 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 513236125, now seen corresponding path program 14 times [2021-06-05 14:30:37,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64370624] [2021-06-05 14:30:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64370624] [2021-06-05 14:30:37,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64370624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382278254] [2021-06-05 14:30:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:37,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:37,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:37,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:37,332 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:30:37,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:37,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 14:30:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382278254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:30:37,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848678933] [2021-06-05 14:30:37,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:37,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:37,344 INFO L87 Difference]: Start difference. First operand 283 states and 927 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,535 INFO L93 Difference]: Finished difference Result 488 states and 1470 transitions. [2021-06-05 14:30:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,537 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:30:37,537 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:30:37,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:30:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 14:30:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.187692307692308) internal successors, (1036), 325 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1036 transitions. [2021-06-05 14:30:37,543 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1036 transitions. Word has length 20 [2021-06-05 14:30:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,543 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1036 transitions. [2021-06-05 14:30:37,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1036 transitions. [2021-06-05 14:30:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:37,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,544 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,761 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1671879655, now seen corresponding path program 15 times [2021-06-05 14:30:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571058064] [2021-06-05 14:30:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571058064] [2021-06-05 14:30:37,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571058064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121004227] [2021-06-05 14:30:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:37,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:37,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:37,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:37,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:37,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:37,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:37,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 14:30:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121004227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:30:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478855106] [2021-06-05 14:30:37,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:37,951 INFO L87 Difference]: Start difference. First operand 326 states and 1036 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,169 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2021-06-05 14:30:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,172 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:30:38,172 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:30:38,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:30:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 329. [2021-06-05 14:30:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.192073170731707) internal successors, (1047), 328 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1047 transitions. [2021-06-05 14:30:38,180 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1047 transitions. Word has length 20 [2021-06-05 14:30:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,180 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1047 transitions. [2021-06-05 14:30:38,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1047 transitions. [2021-06-05 14:30:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:38,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,182 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 14:30:38,397 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash 177971933, now seen corresponding path program 16 times [2021-06-05 14:30:38,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024418857] [2021-06-05 14:30:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024418857] [2021-06-05 14:30:38,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024418857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909199854] [2021-06-05 14:30:38,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:38,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:38,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:38,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:38,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,611 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:30:38,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:38,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 14:30:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909199854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:38,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:30:38,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550232406] [2021-06-05 14:30:38,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:38,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:38,647 INFO L87 Difference]: Start difference. First operand 329 states and 1047 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,874 INFO L93 Difference]: Finished difference Result 497 states and 1488 transitions. [2021-06-05 14:30:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,876 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:30:38,876 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:30:38,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:30:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 329. [2021-06-05 14:30:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.182926829268293) internal successors, (1044), 328 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1044 transitions. [2021-06-05 14:30:38,899 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1044 transitions. Word has length 20 [2021-06-05 14:30:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,900 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1044 transitions. [2021-06-05 14:30:38,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1044 transitions. [2021-06-05 14:30:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:38,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,900 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 14:30:39,101 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1528996053, now seen corresponding path program 17 times [2021-06-05 14:30:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530920659] [2021-06-05 14:30:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530920659] [2021-06-05 14:30:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530920659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50855343] [2021-06-05 14:30:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50855343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:39,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595722150] [2021-06-05 14:30:39,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:39,370 INFO L87 Difference]: Start difference. First operand 329 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,592 INFO L93 Difference]: Finished difference Result 500 states and 1492 transitions. [2021-06-05 14:30:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,594 INFO L225 Difference]: With dead ends: 500 [2021-06-05 14:30:39,594 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:30:39,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:30:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-06-05 14:30:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.191616766467066) internal successors, (1066), 334 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1066 transitions. [2021-06-05 14:30:39,601 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1066 transitions. Word has length 20 [2021-06-05 14:30:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,601 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1066 transitions. [2021-06-05 14:30:39,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1066 transitions. [2021-06-05 14:30:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:39,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,603 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 14:30:39,817 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1272063521, now seen corresponding path program 18 times [2021-06-05 14:30:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090755455] [2021-06-05 14:30:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090755455] [2021-06-05 14:30:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090755455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304625985] [2021-06-05 14:30:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:39,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304625985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:40,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921182888] [2021-06-05 14:30:40,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:40,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:40,065 INFO L87 Difference]: Start difference. First operand 335 states and 1066 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,354 INFO L93 Difference]: Finished difference Result 506 states and 1499 transitions. [2021-06-05 14:30:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,356 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:30:40,356 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:30:40,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:30:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 332. [2021-06-05 14:30:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.187311178247734) internal successors, (1055), 331 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1055 transitions. [2021-06-05 14:30:40,362 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1055 transitions. Word has length 20 [2021-06-05 14:30:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,362 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1055 transitions. [2021-06-05 14:30:40,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1055 transitions. [2021-06-05 14:30:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:40,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,363 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 14:30:40,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1809919099, now seen corresponding path program 19 times [2021-06-05 14:30:40,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951833020] [2021-06-05 14:30:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951833020] [2021-06-05 14:30:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951833020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564098796] [2021-06-05 14:30:40,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564098796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:40,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761092670] [2021-06-05 14:30:40,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:40,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:40,797 INFO L87 Difference]: Start difference. First operand 332 states and 1055 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,036 INFO L93 Difference]: Finished difference Result 464 states and 1404 transitions. [2021-06-05 14:30:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:41,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,037 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:30:41,037 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 14:30:41,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 14:30:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 332. [2021-06-05 14:30:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.178247734138973) internal successors, (1052), 331 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1052 transitions. [2021-06-05 14:30:41,043 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1052 transitions. Word has length 20 [2021-06-05 14:30:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,043 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1052 transitions. [2021-06-05 14:30:41,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1052 transitions. [2021-06-05 14:30:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:41,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,044 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:41,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,260 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1880172963, now seen corresponding path program 20 times [2021-06-05 14:30:41,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:41,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482281122] [2021-06-05 14:30:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482281122] [2021-06-05 14:30:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482281122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215073391] [2021-06-05 14:30:41,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:41,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:41,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215073391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:41,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:41,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683911830] [2021-06-05 14:30:41,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:41,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:41,481 INFO L87 Difference]: Start difference. First operand 332 states and 1052 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,736 INFO L93 Difference]: Finished difference Result 554 states and 1629 transitions. [2021-06-05 14:30:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,738 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:30:41,738 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:30:41,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:30:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 341. [2021-06-05 14:30:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1911764705882355) internal successors, (1085), 340 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1085 transitions. [2021-06-05 14:30:41,745 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1085 transitions. Word has length 20 [2021-06-05 14:30:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,745 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1085 transitions. [2021-06-05 14:30:41,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1085 transitions. [2021-06-05 14:30:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:41,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,745 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:41,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,961 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 386265241, now seen corresponding path program 21 times [2021-06-05 14:30:41,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:41,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307258743] [2021-06-05 14:30:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307258743] [2021-06-05 14:30:42,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307258743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945024518] [2021-06-05 14:30:42,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945024518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:42,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956642489] [2021-06-05 14:30:42,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:42,178 INFO L87 Difference]: Start difference. First operand 341 states and 1085 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:42,551 INFO L93 Difference]: Finished difference Result 560 states and 1636 transitions. [2021-06-05 14:30:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:42,553 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:30:42,553 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:30:42,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:30:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 338. [2021-06-05 14:30:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1869436201780417) internal successors, (1074), 337 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1074 transitions. [2021-06-05 14:30:42,563 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1074 transitions. Word has length 20 [2021-06-05 14:30:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:42,563 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1074 transitions. [2021-06-05 14:30:42,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1074 transitions. [2021-06-05 14:30:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:42,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:42,564 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:42,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 14:30:42,781 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash 924120819, now seen corresponding path program 22 times [2021-06-05 14:30:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:42,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028533027] [2021-06-05 14:30:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028533027] [2021-06-05 14:30:42,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028533027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933851588] [2021-06-05 14:30:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933851588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:43,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:43,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676268519] [2021-06-05 14:30:43,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:43,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:43,022 INFO L87 Difference]: Start difference. First operand 338 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:43,313 INFO L93 Difference]: Finished difference Result 524 states and 1554 transitions. [2021-06-05 14:30:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:43,315 INFO L225 Difference]: With dead ends: 524 [2021-06-05 14:30:43,315 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:30:43,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:30:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-06-05 14:30:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.182634730538922) internal successors, (1063), 334 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1063 transitions. [2021-06-05 14:30:43,320 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1063 transitions. Word has length 20 [2021-06-05 14:30:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:43,321 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1063 transitions. [2021-06-05 14:30:43,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1063 transitions. [2021-06-05 14:30:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:43,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:43,321 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:43,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:43,536 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1511866141, now seen corresponding path program 23 times [2021-06-05 14:30:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:43,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974502724] [2021-06-05 14:30:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974502724] [2021-06-05 14:30:43,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974502724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271704092] [2021-06-05 14:30:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:43,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:43,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271704092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:43,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:30:43,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137078781] [2021-06-05 14:30:43,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:43,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:43,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:43,723 INFO L87 Difference]: Start difference. First operand 335 states and 1063 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,010 INFO L93 Difference]: Finished difference Result 515 states and 1530 transitions. [2021-06-05 14:30:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,012 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:30:44,012 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:30:44,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:30:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 335. [2021-06-05 14:30:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 14:30:44,017 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 14:30:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,017 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 14:30:44,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 14:30:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:44,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,018 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 14:30:44,228 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash 426307966, now seen corresponding path program 24 times [2021-06-05 14:30:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814864310] [2021-06-05 14:30:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814864310] [2021-06-05 14:30:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814864310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873153015] [2021-06-05 14:30:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:44,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:44,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:44,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,391 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:30:44,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:44,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:30:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873153015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:44,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:30:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844089694] [2021-06-05 14:30:44,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:44,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:44,431 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,703 INFO L93 Difference]: Finished difference Result 487 states and 1495 transitions. [2021-06-05 14:30:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,705 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:30:44,705 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:30:44,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:30:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-06-05 14:30:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 14:30:44,710 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 14:30:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,710 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 14:30:44,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 14:30:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:44,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,711 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:44,913 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1652166947, now seen corresponding path program 25 times [2021-06-05 14:30:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319487319] [2021-06-05 14:30:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319487319] [2021-06-05 14:30:44,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319487319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683240237] [2021-06-05 14:30:44,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:45,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:45,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,105 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:30:45,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:45,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 14:30:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683240237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:45,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35878213] [2021-06-05 14:30:45,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:45,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:45,129 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,329 INFO L93 Difference]: Finished difference Result 542 states and 1611 transitions. [2021-06-05 14:30:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,331 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:30:45,331 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:30:45,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:30:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 345. [2021-06-05 14:30:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.1569767441860463) internal successors, (1086), 344 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1086 transitions. [2021-06-05 14:30:45,337 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1086 transitions. Word has length 20 [2021-06-05 14:30:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,337 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1086 transitions. [2021-06-05 14:30:45,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1086 transitions. [2021-06-05 14:30:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:45,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:45,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 14:30:45,554 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1484156819, now seen corresponding path program 26 times [2021-06-05 14:30:45,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:45,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839965698] [2021-06-05 14:30:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839965698] [2021-06-05 14:30:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839965698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653032788] [2021-06-05 14:30:45,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:45,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:45,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:45,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:45,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,750 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:30:45,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:45,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 14:30:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653032788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:45,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:45,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717566637] [2021-06-05 14:30:45,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:45,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:45,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:45,774 INFO L87 Difference]: Start difference. First operand 345 states and 1086 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,988 INFO L93 Difference]: Finished difference Result 594 states and 1732 transitions. [2021-06-05 14:30:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,990 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:30:45,990 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:30:45,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:30:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 348. [2021-06-05 14:30:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.161383285302594) internal successors, (1097), 347 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1097 transitions. [2021-06-05 14:30:45,995 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1097 transitions. Word has length 20 [2021-06-05 14:30:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,995 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1097 transitions. [2021-06-05 14:30:45,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1097 transitions. [2021-06-05 14:30:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:45,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,996 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,209 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1316902755, now seen corresponding path program 27 times [2021-06-05 14:30:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085859266] [2021-06-05 14:30:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085859266] [2021-06-05 14:30:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085859266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251197619] [2021-06-05 14:30:46,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:46,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:46,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:46,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:46,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,375 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:30:46,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:46,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 14:30:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251197619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:46,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:46,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987943685] [2021-06-05 14:30:46,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:46,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:46,397 INFO L87 Difference]: Start difference. First operand 348 states and 1097 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,550 INFO L93 Difference]: Finished difference Result 551 states and 1629 transitions. [2021-06-05 14:30:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,552 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:30:46,552 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 14:30:46,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 14:30:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 340. [2021-06-05 14:30:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1651917404129795) internal successors, (1073), 339 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1073 transitions. [2021-06-05 14:30:46,559 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1073 transitions. Word has length 20 [2021-06-05 14:30:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,559 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1073 transitions. [2021-06-05 14:30:46,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1073 transitions. [2021-06-05 14:30:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:46,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,559 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 14:30:46,773 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash -390065231, now seen corresponding path program 28 times [2021-06-05 14:30:46,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615204790] [2021-06-05 14:30:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615204790] [2021-06-05 14:30:46,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615204790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926109183] [2021-06-05 14:30:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:46,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926109183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:46,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:46,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587168819] [2021-06-05 14:30:46,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:46,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:46,995 INFO L87 Difference]: Start difference. First operand 340 states and 1073 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,181 INFO L93 Difference]: Finished difference Result 520 states and 1545 transitions. [2021-06-05 14:30:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,183 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:30:47,183 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:30:47,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:30:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2021-06-05 14:30:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1739130434782608) internal successors, (1095), 345 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1095 transitions. [2021-06-05 14:30:47,188 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1095 transitions. Word has length 20 [2021-06-05 14:30:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,188 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1095 transitions. [2021-06-05 14:30:47,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1095 transitions. [2021-06-05 14:30:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:47,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,189 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:47,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:47,405 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1883972953, now seen corresponding path program 29 times [2021-06-05 14:30:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:47,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909467622] [2021-06-05 14:30:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:47,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909467622] [2021-06-05 14:30:47,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909467622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932249837] [2021-06-05 14:30:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:47,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932249837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:47,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:47,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270062586] [2021-06-05 14:30:47,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:47,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:47,625 INFO L87 Difference]: Start difference. First operand 346 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,898 INFO L93 Difference]: Finished difference Result 526 states and 1552 transitions. [2021-06-05 14:30:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,900 INFO L225 Difference]: With dead ends: 526 [2021-06-05 14:30:47,900 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:30:47,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:30:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2021-06-05 14:30:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1695906432748537) internal successors, (1084), 342 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1084 transitions. [2021-06-05 14:30:47,905 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1084 transitions. Word has length 20 [2021-06-05 14:30:47,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,905 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1084 transitions. [2021-06-05 14:30:47,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1084 transitions. [2021-06-05 14:30:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:47,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,906 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:48,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 14:30:48,107 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1346117375, now seen corresponding path program 30 times [2021-06-05 14:30:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:48,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375310938] [2021-06-05 14:30:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:48,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375310938] [2021-06-05 14:30:48,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375310938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888976028] [2021-06-05 14:30:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:48,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:48,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888976028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:48,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014452929] [2021-06-05 14:30:48,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:48,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:48,408 INFO L87 Difference]: Start difference. First operand 343 states and 1084 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:48,664 INFO L93 Difference]: Finished difference Result 484 states and 1457 transitions. [2021-06-05 14:30:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:48,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:48,666 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:30:48,666 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:30:48,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:30:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 335. [2021-06-05 14:30:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1736526946107784) internal successors, (1060), 334 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 14:30:48,670 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 14:30:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:48,670 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 14:30:48,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 14:30:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:48,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:48,671 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:48,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 14:30:48,872 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1184106974, now seen corresponding path program 31 times [2021-06-05 14:30:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:48,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351198632] [2021-06-05 14:30:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351198632] [2021-06-05 14:30:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351198632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447682598] [2021-06-05 14:30:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:49,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,047 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 14:30:49,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:49,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:49,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,078 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:30:49,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:49,078 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-06-05 14:30:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447682598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:30:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181902772] [2021-06-05 14:30:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:49,140 INFO L87 Difference]: Start difference. First operand 335 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,402 INFO L93 Difference]: Finished difference Result 528 states and 1594 transitions. [2021-06-05 14:30:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,403 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:30:49,403 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:30:49,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:30:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 340. [2021-06-05 14:30:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.200589970501475) internal successors, (1085), 339 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1085 transitions. [2021-06-05 14:30:49,408 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1085 transitions. Word has length 20 [2021-06-05 14:30:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,408 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1085 transitions. [2021-06-05 14:30:49,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1085 transitions. [2021-06-05 14:30:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:49,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,409 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:49,625 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2101485159, now seen corresponding path program 32 times [2021-06-05 14:30:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276910218] [2021-06-05 14:30:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276910218] [2021-06-05 14:30:49,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276910218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797269871] [2021-06-05 14:30:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:49,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:49,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:49,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:49,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:49,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,855 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-06-05 14:30:49,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:49,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,887 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-06-05 14:30:49,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:49,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,909 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:30:49,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:49,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-06-05 14:30:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797269871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:49,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947460884] [2021-06-05 14:30:49,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:49,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:49,956 INFO L87 Difference]: Start difference. First operand 340 states and 1085 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,352 INFO L93 Difference]: Finished difference Result 649 states and 1911 transitions. [2021-06-05 14:30:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,354 INFO L225 Difference]: With dead ends: 649 [2021-06-05 14:30:50,354 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 14:30:50,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 14:30:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 352. [2021-06-05 14:30:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.207977207977208) internal successors, (1126), 351 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1126 transitions. [2021-06-05 14:30:50,360 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1126 transitions. Word has length 20 [2021-06-05 14:30:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,360 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1126 transitions. [2021-06-05 14:30:50,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1126 transitions. [2021-06-05 14:30:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:50,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,361 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:50,569 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash -942841629, now seen corresponding path program 33 times [2021-06-05 14:30:50,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118721374] [2021-06-05 14:30:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118721374] [2021-06-05 14:30:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118721374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737271392] [2021-06-05 14:30:50,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:50,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:50,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,780 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 14:30:50,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:50,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:50,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,803 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:30:50,803 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:30:50,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:50,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:30:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737271392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:50,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:50,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:50,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543721782] [2021-06-05 14:30:50,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:50,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:50,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:50,861 INFO L87 Difference]: Start difference. First operand 352 states and 1126 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,155 INFO L93 Difference]: Finished difference Result 701 states and 2032 transitions. [2021-06-05 14:30:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,157 INFO L225 Difference]: With dead ends: 701 [2021-06-05 14:30:51,157 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 14:30:51,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 14:30:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 358. [2021-06-05 14:30:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.224089635854342) internal successors, (1151), 357 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1151 transitions. [2021-06-05 14:30:51,163 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1151 transitions. Word has length 20 [2021-06-05 14:30:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,163 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1151 transitions. [2021-06-05 14:30:51,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1151 transitions. [2021-06-05 14:30:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:51,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,164 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:51,377 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1858217945, now seen corresponding path program 34 times [2021-06-05 14:30:51,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352209072] [2021-06-05 14:30:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352209072] [2021-06-05 14:30:51,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352209072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814918178] [2021-06-05 14:30:51,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:51,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:51,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:51,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:51,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:51,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,606 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 14:30:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:51,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:51,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:51,620 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 14:30:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814918178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:51,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:51,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:30:51,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89413589] [2021-06-05 14:30:51,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:51,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:51,661 INFO L87 Difference]: Start difference. First operand 358 states and 1151 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,888 INFO L93 Difference]: Finished difference Result 658 states and 1923 transitions. [2021-06-05 14:30:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,890 INFO L225 Difference]: With dead ends: 658 [2021-06-05 14:30:51,890 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 14:30:51,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 14:30:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2021-06-05 14:30:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.211267605633803) internal successors, (1140), 355 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1140 transitions. [2021-06-05 14:30:51,895 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1140 transitions. Word has length 20 [2021-06-05 14:30:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,896 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1140 transitions. [2021-06-05 14:30:51,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1140 transitions. [2021-06-05 14:30:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:51,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,896 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,112 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1690972674, now seen corresponding path program 35 times [2021-06-05 14:30:52,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667518837] [2021-06-05 14:30:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667518837] [2021-06-05 14:30:52,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667518837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57756810] [2021-06-05 14:30:52,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:52,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:52,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:52,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:52,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:52,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:52,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,294 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:30:52,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:52,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 14:30:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57756810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:30:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111198995] [2021-06-05 14:30:52,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:52,349 INFO L87 Difference]: Start difference. First operand 356 states and 1140 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,620 INFO L93 Difference]: Finished difference Result 461 states and 1410 transitions. [2021-06-05 14:30:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,622 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:30:52,622 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:30:52,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:30:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 347. [2021-06-05 14:30:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1763005780346822) internal successors, (1099), 346 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1099 transitions. [2021-06-05 14:30:52,627 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1099 transitions. Word has length 20 [2021-06-05 14:30:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,627 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1099 transitions. [2021-06-05 14:30:52,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1099 transitions. [2021-06-05 14:30:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:52,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,627 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 14:30:52,828 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash -282908061, now seen corresponding path program 36 times [2021-06-05 14:30:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458810658] [2021-06-05 14:30:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458810658] [2021-06-05 14:30:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458810658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60652078] [2021-06-05 14:30:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:53,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,037 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 14:30:53,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:53,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:53,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:30:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60652078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:53,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164419876] [2021-06-05 14:30:53,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:53,103 INFO L87 Difference]: Start difference. First operand 347 states and 1099 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:53,374 INFO L93 Difference]: Finished difference Result 602 states and 1789 transitions. [2021-06-05 14:30:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:53,376 INFO L225 Difference]: With dead ends: 602 [2021-06-05 14:30:53,376 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 14:30:53,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 14:30:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 337. [2021-06-05 14:30:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1785714285714284) internal successors, (1068), 336 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1068 transitions. [2021-06-05 14:30:53,381 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1068 transitions. Word has length 20 [2021-06-05 14:30:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:53,381 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1068 transitions. [2021-06-05 14:30:53,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1068 transitions. [2021-06-05 14:30:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:53,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:53,381 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:53,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,582 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1350143331, now seen corresponding path program 37 times [2021-06-05 14:30:53,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:53,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284601916] [2021-06-05 14:30:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284601916] [2021-06-05 14:30:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284601916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865652957] [2021-06-05 14:30:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:53,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,775 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 14:30:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,795 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:30:53,795 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:30:53,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:53,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:30:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865652957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:53,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:53,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252372275] [2021-06-05 14:30:53,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:53,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:53,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:53,860 INFO L87 Difference]: Start difference. First operand 337 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,244 INFO L93 Difference]: Finished difference Result 598 states and 1773 transitions. [2021-06-05 14:30:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,245 INFO L225 Difference]: With dead ends: 598 [2021-06-05 14:30:54,245 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 14:30:54,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 14:30:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 340. [2021-06-05 14:30:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1946902654867255) internal successors, (1083), 339 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 14:30:54,254 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 14:30:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,254 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 14:30:54,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 14:30:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:54,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,255 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:54,469 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash -606993625, now seen corresponding path program 38 times [2021-06-05 14:30:54,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240647350] [2021-06-05 14:30:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240647350] [2021-06-05 14:30:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240647350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:54,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341144526] [2021-06-05 14:30:54,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:54,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:54,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:54,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:54,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,672 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 14:30:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:54,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:54,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:54,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,713 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:30:54,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:54,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 14:30:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341144526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:54,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:54,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:54,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040271237] [2021-06-05 14:30:54,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:54,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:54,779 INFO L87 Difference]: Start difference. First operand 340 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,061 INFO L93 Difference]: Finished difference Result 536 states and 1630 transitions. [2021-06-05 14:30:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,062 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:30:55,062 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:30:55,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:30:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-06-05 14:30:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1946902654867255) internal successors, (1083), 339 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 14:30:55,067 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 14:30:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,067 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 14:30:55,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 14:30:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:55,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,068 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:55,268 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 681956465, now seen corresponding path program 39 times [2021-06-05 14:30:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375801390] [2021-06-05 14:30:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375801390] [2021-06-05 14:30:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375801390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371240086] [2021-06-05 14:30:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:55,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:55,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:55,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,513 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 14:30:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:55,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,536 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 14:30:55,536 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:30:55,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:55,537 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:30:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371240086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:55,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:55,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957194338] [2021-06-05 14:30:55,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:55,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:55,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:55,612 INFO L87 Difference]: Start difference. First operand 340 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,938 INFO L93 Difference]: Finished difference Result 646 states and 1914 transitions. [2021-06-05 14:30:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,939 INFO L225 Difference]: With dead ends: 646 [2021-06-05 14:30:55,940 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 14:30:55,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 14:30:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 348. [2021-06-05 14:30:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.2247838616714697) internal successors, (1119), 347 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1119 transitions. [2021-06-05 14:30:55,945 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1119 transitions. Word has length 20 [2021-06-05 14:30:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,945 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1119 transitions. [2021-06-05 14:30:55,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1119 transitions. [2021-06-05 14:30:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:55,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,946 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 14:30:56,146 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -811951257, now seen corresponding path program 40 times [2021-06-05 14:30:56,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027906717] [2021-06-05 14:30:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027906717] [2021-06-05 14:30:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027906717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493373359] [2021-06-05 14:30:56,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:56,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:56,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:56,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:56,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:56,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,358 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-06-05 14:30:56,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:56,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,379 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 14:30:56,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:56,379 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-06-05 14:30:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493373359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:56,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533575191] [2021-06-05 14:30:56,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:56,451 INFO L87 Difference]: Start difference. First operand 348 states and 1119 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:56,755 INFO L93 Difference]: Finished difference Result 632 states and 1863 transitions. [2021-06-05 14:30:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:56,756 INFO L225 Difference]: With dead ends: 632 [2021-06-05 14:30:56,756 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 14:30:56,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 14:30:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 351. [2021-06-05 14:30:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.202857142857143) internal successors, (1121), 350 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1121 transitions. [2021-06-05 14:30:56,762 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1121 transitions. Word has length 20 [2021-06-05 14:30:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:56,762 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1121 transitions. [2021-06-05 14:30:56,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1121 transitions. [2021-06-05 14:30:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:56,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:56,763 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,967 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1433356903, now seen corresponding path program 41 times [2021-06-05 14:30:56,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565381453] [2021-06-05 14:30:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565381453] [2021-06-05 14:30:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565381453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018404655] [2021-06-05 14:30:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:57,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:57,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:57,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:57,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,183 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-06-05 14:30:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:57,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:57,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,280 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-06-05 14:30:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:57,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,317 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 14:30:57,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:57,318 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:30:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018404655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:57,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:57,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873410206] [2021-06-05 14:30:57,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:57,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:57,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:57,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:57,396 INFO L87 Difference]: Start difference. First operand 351 states and 1121 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,841 INFO L93 Difference]: Finished difference Result 677 states and 1978 transitions. [2021-06-05 14:30:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,842 INFO L225 Difference]: With dead ends: 677 [2021-06-05 14:30:57,842 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 14:30:57,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 14:30:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 344. [2021-06-05 14:30:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2157434402332363) internal successors, (1103), 343 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1103 transitions. [2021-06-05 14:30:57,848 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1103 transitions. Word has length 20 [2021-06-05 14:30:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,848 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1103 transitions. [2021-06-05 14:30:57,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1103 transitions. [2021-06-05 14:30:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:57,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,849 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,049 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1569267993, now seen corresponding path program 42 times [2021-06-05 14:30:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757171668] [2021-06-05 14:30:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757171668] [2021-06-05 14:30:58,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757171668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493450726] [2021-06-05 14:30:58,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:58,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:58,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:58,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:58,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:58,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:58,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,282 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:30:58,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:58,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:30:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493450726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859892894] [2021-06-05 14:30:58,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:58,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:58,358 INFO L87 Difference]: Start difference. First operand 344 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,635 INFO L93 Difference]: Finished difference Result 611 states and 1830 transitions. [2021-06-05 14:30:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,637 INFO L225 Difference]: With dead ends: 611 [2021-06-05 14:30:58,637 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:30:58,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:30:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 341. [2021-06-05 14:30:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.2) internal successors, (1088), 340 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1088 transitions. [2021-06-05 14:30:58,642 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1088 transitions. Word has length 20 [2021-06-05 14:30:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,642 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1088 transitions. [2021-06-05 14:30:58,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1088 transitions. [2021-06-05 14:30:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:58,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,643 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,843 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1454093431, now seen corresponding path program 43 times [2021-06-05 14:30:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336421026] [2021-06-05 14:30:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336421026] [2021-06-05 14:30:58,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336421026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406160791] [2021-06-05 14:30:58,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:59,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:59,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:59,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,064 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 14:30:59,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:30:59,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,092 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 14:30:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:59,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,111 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:30:59,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:59,112 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 14:30:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406160791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:59,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:30:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347378115] [2021-06-05 14:30:59,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:59,186 INFO L87 Difference]: Start difference. First operand 341 states and 1088 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,599 INFO L93 Difference]: Finished difference Result 583 states and 1732 transitions. [2021-06-05 14:30:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:30:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,600 INFO L225 Difference]: With dead ends: 583 [2021-06-05 14:30:59,600 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 14:30:59,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 14:30:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 351. [2021-06-05 14:30:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1857142857142855) internal successors, (1115), 350 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1115 transitions. [2021-06-05 14:30:59,606 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1115 transitions. Word has length 20 [2021-06-05 14:30:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,606 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1115 transitions. [2021-06-05 14:30:59,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1115 transitions. [2021-06-05 14:30:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:30:59,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,607 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:59,814 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash -461330495, now seen corresponding path program 44 times [2021-06-05 14:30:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979636114] [2021-06-05 14:30:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979636114] [2021-06-05 14:30:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979636114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057676647] [2021-06-05 14:30:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:59,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:59,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:30:59,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:59,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:59,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,026 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 14:31:00,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:00,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,047 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 14:31:00,047 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:00,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:00,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:31:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057676647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:00,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436512325] [2021-06-05 14:31:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:00,118 INFO L87 Difference]: Start difference. First operand 351 states and 1115 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:00,377 INFO L93 Difference]: Finished difference Result 554 states and 1678 transitions. [2021-06-05 14:31:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:00,378 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:31:00,378 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:31:00,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:31:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 343. [2021-06-05 14:31:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.195906432748538) internal successors, (1093), 342 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1093 transitions. [2021-06-05 14:31:00,383 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1093 transitions. Word has length 20 [2021-06-05 14:31:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:00,383 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1093 transitions. [2021-06-05 14:31:00,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1093 transitions. [2021-06-05 14:31:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:00,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:00,384 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:00,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-05 14:31:00,584 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:00,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1560931869, now seen corresponding path program 45 times [2021-06-05 14:31:00,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:00,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813588137] [2021-06-05 14:31:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813588137] [2021-06-05 14:31:00,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813588137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011678553] [2021-06-05 14:31:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:00,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:00,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011678553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:00,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045367839] [2021-06-05 14:31:00,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:00,858 INFO L87 Difference]: Start difference. First operand 343 states and 1093 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:01,131 INFO L93 Difference]: Finished difference Result 531 states and 1604 transitions. [2021-06-05 14:31:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:01,132 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:31:01,132 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:31:01,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:31:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 350. [2021-06-05 14:31:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.2091690544412605) internal successors, (1120), 349 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1120 transitions. [2021-06-05 14:31:01,137 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1120 transitions. Word has length 20 [2021-06-05 14:31:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:01,137 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1120 transitions. [2021-06-05 14:31:01,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1120 transitions. [2021-06-05 14:31:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:01,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:01,138 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:01,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,338 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1240127705, now seen corresponding path program 46 times [2021-06-05 14:31:01,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:01,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909779499] [2021-06-05 14:31:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909779499] [2021-06-05 14:31:01,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909779499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883749065] [2021-06-05 14:31:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:01,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883749065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:01,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302696971] [2021-06-05 14:31:01,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:01,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:01,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:01,598 INFO L87 Difference]: Start difference. First operand 350 states and 1120 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:01,929 INFO L93 Difference]: Finished difference Result 537 states and 1611 transitions. [2021-06-05 14:31:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:01,930 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:31:01,930 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:31:01,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:31:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 347. [2021-06-05 14:31:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2052023121387285) internal successors, (1109), 346 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1109 transitions. [2021-06-05 14:31:01,935 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1109 transitions. Word has length 20 [2021-06-05 14:31:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:01,935 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1109 transitions. [2021-06-05 14:31:01,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1109 transitions. [2021-06-05 14:31:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:01,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:01,936 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:02,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 14:31:02,141 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1777983283, now seen corresponding path program 47 times [2021-06-05 14:31:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:02,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243407659] [2021-06-05 14:31:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:02,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:02,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243407659] [2021-06-05 14:31:02,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243407659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935814658] [2021-06-05 14:31:02,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:02,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:02,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:02,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935814658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020277962] [2021-06-05 14:31:02,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:02,388 INFO L87 Difference]: Start difference. First operand 347 states and 1109 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:02,697 INFO L93 Difference]: Finished difference Result 501 states and 1529 transitions. [2021-06-05 14:31:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:02,698 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:31:02,698 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:31:02,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:31:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 344. [2021-06-05 14:31:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2011661807580176) internal successors, (1098), 343 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 14:31:02,703 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 14:31:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:02,703 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 14:31:02,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 14:31:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:02,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:02,703 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:02,913 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 257645229, now seen corresponding path program 48 times [2021-06-05 14:31:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576565757] [2021-06-05 14:31:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:02,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:02,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576565757] [2021-06-05 14:31:02,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576565757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444070445] [2021-06-05 14:31:02,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:03,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444070445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:03,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:03,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190501527] [2021-06-05 14:31:03,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:03,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:03,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:03,182 INFO L87 Difference]: Start difference. First operand 344 states and 1098 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:03,587 INFO L93 Difference]: Finished difference Result 615 states and 1814 transitions. [2021-06-05 14:31:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:03,588 INFO L225 Difference]: With dead ends: 615 [2021-06-05 14:31:03,588 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 14:31:03,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 14:31:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 352. [2021-06-05 14:31:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.230769230769231) internal successors, (1134), 351 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1134 transitions. [2021-06-05 14:31:03,594 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1134 transitions. Word has length 20 [2021-06-05 14:31:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:03,594 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1134 transitions. [2021-06-05 14:31:03,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1134 transitions. [2021-06-05 14:31:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:03,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:03,599 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:03,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,799 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1236262493, now seen corresponding path program 49 times [2021-06-05 14:31:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:03,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955160063] [2021-06-05 14:31:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955160063] [2021-06-05 14:31:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955160063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999297521] [2021-06-05 14:31:03,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:04,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999297521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:04,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:04,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680454923] [2021-06-05 14:31:04,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:04,066 INFO L87 Difference]: Start difference. First operand 352 states and 1134 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:04,530 INFO L93 Difference]: Finished difference Result 621 states and 1815 transitions. [2021-06-05 14:31:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:04,531 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:31:04,532 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 14:31:04,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 14:31:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 355. [2021-06-05 14:31:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.209039548022599) internal successors, (1136), 354 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1136 transitions. [2021-06-05 14:31:04,537 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1136 transitions. Word has length 20 [2021-06-05 14:31:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:04,537 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1136 transitions. [2021-06-05 14:31:04,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1136 transitions. [2021-06-05 14:31:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:04,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:04,538 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:04,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,750 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1009045667, now seen corresponding path program 50 times [2021-06-05 14:31:04,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:04,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137452274] [2021-06-05 14:31:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:04,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137452274] [2021-06-05 14:31:04,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137452274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202713157] [2021-06-05 14:31:04,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:04,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202713157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:05,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:05,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173830047] [2021-06-05 14:31:05,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:05,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:05,040 INFO L87 Difference]: Start difference. First operand 355 states and 1136 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:05,409 INFO L93 Difference]: Finished difference Result 612 states and 1801 transitions. [2021-06-05 14:31:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:05,410 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:31:05,410 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:31:05,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:31:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 348. [2021-06-05 14:31:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.2219020172910664) internal successors, (1118), 347 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1118 transitions. [2021-06-05 14:31:05,415 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1118 transitions. Word has length 20 [2021-06-05 14:31:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1118 transitions. [2021-06-05 14:31:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1118 transitions. [2021-06-05 14:31:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:05,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:05,416 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:05,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 14:31:05,632 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1993579229, now seen corresponding path program 51 times [2021-06-05 14:31:05,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:05,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624360398] [2021-06-05 14:31:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624360398] [2021-06-05 14:31:05,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624360398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274887927] [2021-06-05 14:31:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274887927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:05,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005790742] [2021-06-05 14:31:05,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:05,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:05,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:05,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:05,875 INFO L87 Difference]: Start difference. First operand 348 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:06,114 INFO L93 Difference]: Finished difference Result 546 states and 1653 transitions. [2021-06-05 14:31:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:06,116 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:31:06,116 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:31:06,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:31:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 345. [2021-06-05 14:31:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.2063953488372094) internal successors, (1103), 344 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-06-05 14:31:06,121 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-06-05 14:31:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:06,121 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-06-05 14:31:06,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-06-05 14:31:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:06,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:06,121 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:06,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 14:31:06,322 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1029782195, now seen corresponding path program 52 times [2021-06-05 14:31:06,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:06,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946026431] [2021-06-05 14:31:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:06,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:06,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946026431] [2021-06-05 14:31:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946026431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116202481] [2021-06-05 14:31:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:06,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:06,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:06,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:06,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116202481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:06,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596345090] [2021-06-05 14:31:06,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:06,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:06,572 INFO L87 Difference]: Start difference. First operand 345 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:07,073 INFO L93 Difference]: Finished difference Result 589 states and 1742 transitions. [2021-06-05 14:31:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:07,075 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:31:07,075 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 14:31:07,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 14:31:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-06-05 14:31:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1920903954802258) internal successors, (1130), 354 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1130 transitions. [2021-06-05 14:31:07,080 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1130 transitions. Word has length 20 [2021-06-05 14:31:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:07,080 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1130 transitions. [2021-06-05 14:31:07,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1130 transitions. [2021-06-05 14:31:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:07,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:07,081 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:07,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 14:31:07,281 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash -885641731, now seen corresponding path program 53 times [2021-06-05 14:31:07,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:07,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662738269] [2021-06-05 14:31:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:07,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662738269] [2021-06-05 14:31:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662738269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269878153] [2021-06-05 14:31:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:07,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:07,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269878153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:07,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:07,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992244067] [2021-06-05 14:31:07,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:07,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:07,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:07,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:07,535 INFO L87 Difference]: Start difference. First operand 355 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:07,949 INFO L93 Difference]: Finished difference Result 560 states and 1688 transitions. [2021-06-05 14:31:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:07,951 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:31:07,951 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:31:07,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:31:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 344. [2021-06-05 14:31:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.2011661807580176) internal successors, (1098), 343 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 14:31:07,956 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 14:31:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:07,956 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 14:31:07,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 14:31:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:07,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:07,956 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:08,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,157 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash -989075421, now seen corresponding path program 54 times [2021-06-05 14:31:08,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:08,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507702997] [2021-06-05 14:31:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:08,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507702997] [2021-06-05 14:31:08,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507702997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421083672] [2021-06-05 14:31:08,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421083672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:08,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894537828] [2021-06-05 14:31:08,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:08,397 INFO L87 Difference]: Start difference. First operand 344 states and 1098 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:08,671 INFO L93 Difference]: Finished difference Result 492 states and 1505 transitions. [2021-06-05 14:31:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:08,672 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:31:08,672 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:31:08,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:31:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 346. [2021-06-05 14:31:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.197101449275362) internal successors, (1103), 345 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 14:31:08,676 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 14:31:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:08,677 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 14:31:08,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 14:31:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:08,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:08,677 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:08,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 14:31:08,893 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -237674983, now seen corresponding path program 55 times [2021-06-05 14:31:08,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:08,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947606781] [2021-06-05 14:31:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947606781] [2021-06-05 14:31:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947606781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412661982] [2021-06-05 14:31:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412661982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:09,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770174077] [2021-06-05 14:31:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:09,146 INFO L87 Difference]: Start difference. First operand 346 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:09,521 INFO L93 Difference]: Finished difference Result 517 states and 1557 transitions. [2021-06-05 14:31:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:09,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:09,523 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:31:09,523 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:31:09,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:31:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 356. [2021-06-05 14:31:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.183098591549296) internal successors, (1130), 355 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1130 transitions. [2021-06-05 14:31:09,529 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1130 transitions. Word has length 20 [2021-06-05 14:31:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:09,529 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1130 transitions. [2021-06-05 14:31:09,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1130 transitions. [2021-06-05 14:31:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:09,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:09,530 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:09,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:09,746 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2141868387, now seen corresponding path program 56 times [2021-06-05 14:31:09,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:09,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378678373] [2021-06-05 14:31:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378678373] [2021-06-05 14:31:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378678373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721178045] [2021-06-05 14:31:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:09,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:09,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721178045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:10,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891822754] [2021-06-05 14:31:10,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:10,002 INFO L87 Difference]: Start difference. First operand 356 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:10,283 INFO L93 Difference]: Finished difference Result 488 states and 1503 transitions. [2021-06-05 14:31:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:10,284 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:31:10,284 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:31:10,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:31:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 346. [2021-06-05 14:31:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.197101449275362) internal successors, (1103), 345 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 14:31:10,289 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 14:31:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:10,289 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 14:31:10,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 14:31:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:10,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:10,289 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:10,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 14:31:10,490 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -56954447, now seen corresponding path program 57 times [2021-06-05 14:31:10,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:10,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553409963] [2021-06-05 14:31:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:10,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553409963] [2021-06-05 14:31:10,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553409963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172612572] [2021-06-05 14:31:10,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:10,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172612572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:10,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085083172] [2021-06-05 14:31:10,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:10,745 INFO L87 Difference]: Start difference. First operand 346 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:11,146 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 14:31:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:11,148 INFO L225 Difference]: With dead ends: 688 [2021-06-05 14:31:11,148 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:31:11,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:31:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 356. [2021-06-05 14:31:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.2140845070422537) internal successors, (1141), 355 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1141 transitions. [2021-06-05 14:31:11,153 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1141 transitions. Word has length 20 [2021-06-05 14:31:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:11,153 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1141 transitions. [2021-06-05 14:31:11,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1141 transitions. [2021-06-05 14:31:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:11,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:11,154 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:11,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,369 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1550862169, now seen corresponding path program 58 times [2021-06-05 14:31:11,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:11,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697941939] [2021-06-05 14:31:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:11,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:11,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697941939] [2021-06-05 14:31:11,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697941939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308015912] [2021-06-05 14:31:11,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308015912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:11,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:11,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85258559] [2021-06-05 14:31:11,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:11,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:11,610 INFO L87 Difference]: Start difference. First operand 356 states and 1141 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:12,090 INFO L93 Difference]: Finished difference Result 694 states and 2066 transitions. [2021-06-05 14:31:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:12,092 INFO L225 Difference]: With dead ends: 694 [2021-06-05 14:31:12,092 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:31:12,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 523.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:31:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 353. [2021-06-05 14:31:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.210227272727273) internal successors, (1130), 352 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1130 transitions. [2021-06-05 14:31:12,097 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1130 transitions. Word has length 20 [2021-06-05 14:31:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:12,097 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1130 transitions. [2021-06-05 14:31:12,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1130 transitions. [2021-06-05 14:31:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:12,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:12,098 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:12,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 14:31:12,298 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1013006591, now seen corresponding path program 59 times [2021-06-05 14:31:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:12,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714532555] [2021-06-05 14:31:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:12,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:12,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714532555] [2021-06-05 14:31:12,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714532555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905182736] [2021-06-05 14:31:12,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:12,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:12,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905182736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:12,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:12,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548404673] [2021-06-05 14:31:12,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:12,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:12,526 INFO L87 Difference]: Start difference. First operand 353 states and 1130 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:12,931 INFO L93 Difference]: Finished difference Result 658 states and 1984 transitions. [2021-06-05 14:31:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:12,936 INFO L225 Difference]: With dead ends: 658 [2021-06-05 14:31:12,936 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 14:31:12,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 14:31:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 350. [2021-06-05 14:31:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.206303724928367) internal successors, (1119), 349 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1119 transitions. [2021-06-05 14:31:12,942 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1119 transitions. Word has length 20 [2021-06-05 14:31:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:12,942 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1119 transitions. [2021-06-05 14:31:12,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1119 transitions. [2021-06-05 14:31:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:12,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:12,942 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:13,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:13,143 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -425261269, now seen corresponding path program 60 times [2021-06-05 14:31:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:13,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739264329] [2021-06-05 14:31:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:13,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:13,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739264329] [2021-06-05 14:31:13,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739264329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:13,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227188048] [2021-06-05 14:31:13,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:13,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:13,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227188048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:13,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:13,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:13,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502093254] [2021-06-05 14:31:13,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:13,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:13,374 INFO L87 Difference]: Start difference. First operand 350 states and 1119 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:13,763 INFO L93 Difference]: Finished difference Result 690 states and 2044 transitions. [2021-06-05 14:31:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:13,765 INFO L225 Difference]: With dead ends: 690 [2021-06-05 14:31:13,765 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 14:31:13,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 14:31:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 347. [2021-06-05 14:31:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2023121387283235) internal successors, (1108), 346 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 14:31:13,770 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 14:31:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:13,770 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 14:31:13,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 14:31:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:13,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:13,771 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:13,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 14:31:13,972 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2098424725, now seen corresponding path program 61 times [2021-06-05 14:31:13,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:13,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73679012] [2021-06-05 14:31:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73679012] [2021-06-05 14:31:14,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73679012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935801920] [2021-06-05 14:31:14,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:14,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935801920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37024087] [2021-06-05 14:31:14,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:14,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:14,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:14,230 INFO L87 Difference]: Start difference. First operand 347 states and 1108 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:14,548 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2021-06-05 14:31:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:14,550 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:31:14,550 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 14:31:14,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 14:31:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 354. [2021-06-05 14:31:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.215297450424929) internal successors, (1135), 353 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1135 transitions. [2021-06-05 14:31:14,556 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1135 transitions. Word has length 20 [2021-06-05 14:31:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:14,556 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1135 transitions. [2021-06-05 14:31:14,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1135 transitions. [2021-06-05 14:31:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:14,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:14,556 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:14,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,773 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 702634849, now seen corresponding path program 62 times [2021-06-05 14:31:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:14,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428154201] [2021-06-05 14:31:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:14,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428154201] [2021-06-05 14:31:14,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428154201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801067993] [2021-06-05 14:31:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:14,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:15,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801067993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:15,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:15,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046829002] [2021-06-05 14:31:15,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:15,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:15,033 INFO L87 Difference]: Start difference. First operand 354 states and 1135 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:15,542 INFO L93 Difference]: Finished difference Result 633 states and 1905 transitions. [2021-06-05 14:31:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:15,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:15,543 INFO L225 Difference]: With dead ends: 633 [2021-06-05 14:31:15,543 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 14:31:15,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 14:31:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 351. [2021-06-05 14:31:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.2114285714285713) internal successors, (1124), 350 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1124 transitions. [2021-06-05 14:31:15,548 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1124 transitions. Word has length 20 [2021-06-05 14:31:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:15,549 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1124 transitions. [2021-06-05 14:31:15,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1124 transitions. [2021-06-05 14:31:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:15,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:15,549 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 14:31:15,750 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1240490427, now seen corresponding path program 63 times [2021-06-05 14:31:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409111520] [2021-06-05 14:31:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:15,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409111520] [2021-06-05 14:31:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409111520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669371979] [2021-06-05 14:31:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:15,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:16,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669371979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:16,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586477757] [2021-06-05 14:31:16,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:16,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:16,032 INFO L87 Difference]: Start difference. First operand 351 states and 1124 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:16,363 INFO L93 Difference]: Finished difference Result 597 states and 1823 transitions. [2021-06-05 14:31:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:16,364 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:31:16,364 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:31:16,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:31:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 348. [2021-06-05 14:31:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.207492795389049) internal successors, (1113), 347 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 14:31:16,369 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 14:31:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:16,369 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 14:31:16,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 14:31:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:16,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:16,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:16,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-06-05 14:31:16,585 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -279847627, now seen corresponding path program 64 times [2021-06-05 14:31:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:16,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101793027] [2021-06-05 14:31:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:16,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:16,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101793027] [2021-06-05 14:31:16,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101793027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100234657] [2021-06-05 14:31:16,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:16,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:16,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:16,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100234657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:16,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:16,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660011562] [2021-06-05 14:31:16,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:16,855 INFO L87 Difference]: Start difference. First operand 348 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:17,470 INFO L93 Difference]: Finished difference Result 702 states and 2083 transitions. [2021-06-05 14:31:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:17,471 INFO L225 Difference]: With dead ends: 702 [2021-06-05 14:31:17,471 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 14:31:17,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 14:31:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-06-05 14:31:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.2366197183098593) internal successors, (1149), 355 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1149 transitions. [2021-06-05 14:31:17,481 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1149 transitions. Word has length 20 [2021-06-05 14:31:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:17,481 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1149 transitions. [2021-06-05 14:31:17,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1149 transitions. [2021-06-05 14:31:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:17,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:17,482 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:17,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 14:31:17,682 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1773755349, now seen corresponding path program 65 times [2021-06-05 14:31:17,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:17,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685398460] [2021-06-05 14:31:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:17,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:17,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685398460] [2021-06-05 14:31:17,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685398460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490239781] [2021-06-05 14:31:17,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:17,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:17,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490239781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905065378] [2021-06-05 14:31:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:17,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:17,933 INFO L87 Difference]: Start difference. First operand 356 states and 1149 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:18,538 INFO L93 Difference]: Finished difference Result 708 states and 2084 transitions. [2021-06-05 14:31:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:18,540 INFO L225 Difference]: With dead ends: 708 [2021-06-05 14:31:18,540 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 14:31:18,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 619.6ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 14:31:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 359. [2021-06-05 14:31:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.2150837988826817) internal successors, (1151), 358 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1151 transitions. [2021-06-05 14:31:18,545 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1151 transitions. Word has length 20 [2021-06-05 14:31:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:18,545 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1151 transitions. [2021-06-05 14:31:18,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1151 transitions. [2021-06-05 14:31:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:18,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:18,546 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:18,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,746 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash 471552811, now seen corresponding path program 66 times [2021-06-05 14:31:18,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:18,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644891590] [2021-06-05 14:31:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:18,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:18,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644891590] [2021-06-05 14:31:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644891590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:18,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567119246] [2021-06-05 14:31:18,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:18,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567119246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:19,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:19,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132294422] [2021-06-05 14:31:19,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:19,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:19,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:19,040 INFO L87 Difference]: Start difference. First operand 359 states and 1151 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:19,371 INFO L93 Difference]: Finished difference Result 670 states and 2004 transitions. [2021-06-05 14:31:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:19,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:19,373 INFO L225 Difference]: With dead ends: 670 [2021-06-05 14:31:19,373 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 14:31:19,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 14:31:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 352. [2021-06-05 14:31:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.2279202279202277) internal successors, (1133), 351 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1133 transitions. [2021-06-05 14:31:19,378 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1133 transitions. Word has length 20 [2021-06-05 14:31:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:19,378 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1133 transitions. [2021-06-05 14:31:19,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1133 transitions. [2021-06-05 14:31:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:19,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:19,379 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:19,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 14:31:19,579 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1763895211, now seen corresponding path program 67 times [2021-06-05 14:31:19,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:19,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382207124] [2021-06-05 14:31:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:19,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382207124] [2021-06-05 14:31:19,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382207124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003398102] [2021-06-05 14:31:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003398102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13255646] [2021-06-05 14:31:19,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:19,858 INFO L87 Difference]: Start difference. First operand 352 states and 1133 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:20,175 INFO L93 Difference]: Finished difference Result 633 states and 1922 transitions. [2021-06-05 14:31:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:20,176 INFO L225 Difference]: With dead ends: 633 [2021-06-05 14:31:20,176 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:31:20,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:31:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 349. [2021-06-05 14:31:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.2126436781609193) internal successors, (1118), 348 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1118 transitions. [2021-06-05 14:31:20,181 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1118 transitions. Word has length 20 [2021-06-05 14:31:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:20,181 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1118 transitions. [2021-06-05 14:31:20,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1118 transitions. [2021-06-05 14:31:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:20,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:20,182 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:20,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,382 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash 492289339, now seen corresponding path program 68 times [2021-06-05 14:31:20,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:20,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277598408] [2021-06-05 14:31:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277598408] [2021-06-05 14:31:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277598408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225924309] [2021-06-05 14:31:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:20,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225924309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:20,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:20,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825574432] [2021-06-05 14:31:20,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:20,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:20,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:20,670 INFO L87 Difference]: Start difference. First operand 349 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:21,396 INFO L93 Difference]: Finished difference Result 670 states and 1996 transitions. [2021-06-05 14:31:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:21,397 INFO L225 Difference]: With dead ends: 670 [2021-06-05 14:31:21,397 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 14:31:21,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 14:31:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 359. [2021-06-05 14:31:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1983240223463687) internal successors, (1145), 358 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1145 transitions. [2021-06-05 14:31:21,403 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1145 transitions. Word has length 20 [2021-06-05 14:31:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:21,403 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1145 transitions. [2021-06-05 14:31:21,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1145 transitions. [2021-06-05 14:31:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:21,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:21,403 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:21,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 14:31:21,604 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1423134587, now seen corresponding path program 69 times [2021-06-05 14:31:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:21,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508640681] [2021-06-05 14:31:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:21,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508640681] [2021-06-05 14:31:21,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508640681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717588915] [2021-06-05 14:31:21,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:21,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717588915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:21,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:21,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458423178] [2021-06-05 14:31:21,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:21,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:21,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:21,868 INFO L87 Difference]: Start difference. First operand 359 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:22,371 INFO L93 Difference]: Finished difference Result 647 states and 1957 transitions. [2021-06-05 14:31:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:22,372 INFO L225 Difference]: With dead ends: 647 [2021-06-05 14:31:22,372 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 14:31:22,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 14:31:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 348. [2021-06-05 14:31:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.207492795389049) internal successors, (1113), 347 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 14:31:22,377 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 14:31:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:22,377 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 14:31:22,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 14:31:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:22,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:22,378 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:22,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 14:31:22,578 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1526568277, now seen corresponding path program 70 times [2021-06-05 14:31:22,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:22,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695290555] [2021-06-05 14:31:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:22,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695290555] [2021-06-05 14:31:22,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695290555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666571507] [2021-06-05 14:31:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:22,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666571507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:22,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521648944] [2021-06-05 14:31:22,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:22,829 INFO L87 Difference]: Start difference. First operand 348 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:23,152 INFO L93 Difference]: Finished difference Result 589 states and 1801 transitions. [2021-06-05 14:31:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:23,153 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:31:23,153 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 14:31:23,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 14:31:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-06-05 14:31:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.2034383954154726) internal successors, (1118), 349 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1118 transitions. [2021-06-05 14:31:23,158 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1118 transitions. Word has length 20 [2021-06-05 14:31:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:23,158 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1118 transitions. [2021-06-05 14:31:23,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1118 transitions. [2021-06-05 14:31:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:23,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:23,158 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:23,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,359 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash -775167839, now seen corresponding path program 71 times [2021-06-05 14:31:23,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:23,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622752866] [2021-06-05 14:31:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622752866] [2021-06-05 14:31:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622752866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244428665] [2021-06-05 14:31:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:23,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:23,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244428665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:23,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523259572] [2021-06-05 14:31:23,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:23,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:23,632 INFO L87 Difference]: Start difference. First operand 350 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,200 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:31:24,321 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 14:31:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:24,330 INFO L93 Difference]: Finished difference Result 614 states and 1853 transitions. [2021-06-05 14:31:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:24,331 INFO L225 Difference]: With dead ends: 614 [2021-06-05 14:31:24,331 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 14:31:24,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 14:31:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 360. [2021-06-05 14:31:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1894150417827296) internal successors, (1145), 359 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1145 transitions. [2021-06-05 14:31:24,336 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1145 transitions. Word has length 20 [2021-06-05 14:31:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:24,336 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1145 transitions. [2021-06-05 14:31:24,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1145 transitions. [2021-06-05 14:31:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:24,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:24,337 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:24,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:24,537 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1604375531, now seen corresponding path program 72 times [2021-06-05 14:31:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:24,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103406997] [2021-06-05 14:31:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103406997] [2021-06-05 14:31:24,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103406997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794746080] [2021-06-05 14:31:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:24,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:24,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:24,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794746080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:24,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:24,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939809468] [2021-06-05 14:31:24,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:24,796 INFO L87 Difference]: Start difference. First operand 360 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:25,216 INFO L93 Difference]: Finished difference Result 585 states and 1799 transitions. [2021-06-05 14:31:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:25,218 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:31:25,218 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:31:25,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:31:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 347. [2021-06-05 14:31:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2023121387283235) internal successors, (1108), 346 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 14:31:25,222 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 14:31:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:25,223 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 14:31:25,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 14:31:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:25,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:25,223 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:25,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-06-05 14:31:25,424 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash -304735173, now seen corresponding path program 73 times [2021-06-05 14:31:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:25,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653212370] [2021-06-05 14:31:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:25,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653212370] [2021-06-05 14:31:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653212370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751954425] [2021-06-05 14:31:25,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:25,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:25,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751954425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:25,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:25,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741599881] [2021-06-05 14:31:25,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:25,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:25,631 INFO L87 Difference]: Start difference. First operand 347 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:25,987 INFO L93 Difference]: Finished difference Result 612 states and 1839 transitions. [2021-06-05 14:31:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:25,989 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:31:25,989 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:31:25,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:31:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 349. [2021-06-05 14:31:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1982758620689653) internal successors, (1113), 348 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 14:31:25,993 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 14:31:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 14:31:25,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 14:31:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:25,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:25,994 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,195 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1707620929, now seen corresponding path program 74 times [2021-06-05 14:31:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454561073] [2021-06-05 14:31:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454561073] [2021-06-05 14:31:26,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454561073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837034606] [2021-06-05 14:31:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837034606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:26,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:26,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187322451] [2021-06-05 14:31:26,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:26,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:26,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:26,439 INFO L87 Difference]: Start difference. First operand 349 states and 1113 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:26,800 INFO L93 Difference]: Finished difference Result 571 states and 1753 transitions. [2021-06-05 14:31:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:26,802 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:31:26,802 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:31:26,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:31:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-06-05 14:31:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1942857142857144) internal successors, (1118), 350 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1118 transitions. [2021-06-05 14:31:26,806 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1118 transitions. Word has length 20 [2021-06-05 14:31:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:26,806 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1118 transitions. [2021-06-05 14:31:26,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1118 transitions. [2021-06-05 14:31:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:26,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:26,807 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:27,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 14:31:27,010 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1835945929, now seen corresponding path program 75 times [2021-06-05 14:31:27,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:27,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696868974] [2021-06-05 14:31:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:27,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696868974] [2021-06-05 14:31:27,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696868974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654143196] [2021-06-05 14:31:27,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:27,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654143196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:27,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774639050] [2021-06-05 14:31:27,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:27,252 INFO L87 Difference]: Start difference. First operand 351 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:27,845 INFO L93 Difference]: Finished difference Result 594 states and 1798 transitions. [2021-06-05 14:31:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:27,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:27,846 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:31:27,846 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:31:27,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:31:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 361. [2021-06-05 14:31:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1805555555555554) internal successors, (1145), 360 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1145 transitions. [2021-06-05 14:31:27,851 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1145 transitions. Word has length 20 [2021-06-05 14:31:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:27,851 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1145 transitions. [2021-06-05 14:31:27,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1145 transitions. [2021-06-05 14:31:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:27,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:27,852 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 14:31:28,052 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 543597441, now seen corresponding path program 76 times [2021-06-05 14:31:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781501138] [2021-06-05 14:31:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781501138] [2021-06-05 14:31:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781501138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474331696] [2021-06-05 14:31:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474331696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202602470] [2021-06-05 14:31:28,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:28,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:28,299 INFO L87 Difference]: Start difference. First operand 361 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:28,700 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-06-05 14:31:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:28,702 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:31:28,702 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:31:28,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:31:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 349. [2021-06-05 14:31:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1982758620689653) internal successors, (1113), 348 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 14:31:28,707 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 14:31:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:28,707 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 14:31:28,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 14:31:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:28,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:28,707 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,908 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,908 INFO L82 PathProgramCache]: Analyzing trace with hash -942811430, now seen corresponding path program 77 times [2021-06-05 14:31:28,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264153429] [2021-06-05 14:31:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:28,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264153429] [2021-06-05 14:31:28,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264153429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085589979] [2021-06-05 14:31:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:29,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:29,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:29,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,049 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:31:29,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:29,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:31:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085589979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:31:29,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015313780] [2021-06-05 14:31:29,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:29,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:29,090 INFO L87 Difference]: Start difference. First operand 349 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:29,290 INFO L93 Difference]: Finished difference Result 493 states and 1515 transitions. [2021-06-05 14:31:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:29,291 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:31:29,291 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:31:29,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:31:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 339. [2021-06-05 14:31:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 14:31:29,295 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 14:31:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:29,295 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 14:31:29,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 14:31:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:29,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:29,295 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:29,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,496 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-06-05 14:31:29,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:29,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005783242] [2021-06-05 14:31:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:29,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005783242] [2021-06-05 14:31:29,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005783242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785602530] [2021-06-05 14:31:29,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:29,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:29,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:29,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:29,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:29,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:29,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 14:31:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785602530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260229854] [2021-06-05 14:31:29,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:29,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:29,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:29,684 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:29,786 INFO L93 Difference]: Finished difference Result 438 states and 1322 transitions. [2021-06-05 14:31:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:29,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:29,787 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:31:29,787 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:31:29,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:31:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-06-05 14:31:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 14:31:29,791 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 14:31:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:29,791 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 14:31:29,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 14:31:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:29,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:29,792 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:29,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,993 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-06-05 14:31:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224598525] [2021-06-05 14:31:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224598525] [2021-06-05 14:31:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224598525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186089942] [2021-06-05 14:31:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:30,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:30,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,148 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:31:30,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:30,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 14:31:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186089942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:30,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:30,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740502913] [2021-06-05 14:31:30,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:30,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:30,170 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,322 INFO L93 Difference]: Finished difference Result 490 states and 1443 transitions. [2021-06-05 14:31:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,323 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:31:30,323 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:31:30,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:31:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 14:31:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1481481481481484) internal successors, (1105), 351 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1105 transitions. [2021-06-05 14:31:30,327 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1105 transitions. Word has length 20 [2021-06-05 14:31:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,328 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1105 transitions. [2021-06-05 14:31:30,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1105 transitions. [2021-06-05 14:31:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:30,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,328 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:30,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,529 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-06-05 14:31:30,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:30,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416323980] [2021-06-05 14:31:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416323980] [2021-06-05 14:31:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416323980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158969658] [2021-06-05 14:31:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:30,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,683 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:31:30,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:30,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 14:31:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158969658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:30,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:30,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504667636] [2021-06-05 14:31:30,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:30,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:30,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:30,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:30,704 INFO L87 Difference]: Start difference. First operand 352 states and 1105 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,831 INFO L93 Difference]: Finished difference Result 447 states and 1340 transitions. [2021-06-05 14:31:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,832 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:31:30,832 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:31:30,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:31:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 344. [2021-06-05 14:31:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.151603498542274) internal successors, (1081), 343 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1081 transitions. [2021-06-05 14:31:30,836 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1081 transitions. Word has length 20 [2021-06-05 14:31:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,836 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1081 transitions. [2021-06-05 14:31:30,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1081 transitions. [2021-06-05 14:31:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:30,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,837 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:31,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,053 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-06-05 14:31:31,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:31,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894132005] [2021-06-05 14:31:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:31,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894132005] [2021-06-05 14:31:31,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894132005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401546555] [2021-06-05 14:31:31,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:31,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401546555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:31,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:31,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438228868] [2021-06-05 14:31:31,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:31,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:31,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:31,252 INFO L87 Difference]: Start difference. First operand 344 states and 1081 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:31,426 INFO L93 Difference]: Finished difference Result 416 states and 1256 transitions. [2021-06-05 14:31:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:31,431 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:31:31,431 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:31:31,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:31:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-05 14:31:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.160458452722063) internal successors, (1103), 349 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1103 transitions. [2021-06-05 14:31:31,435 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1103 transitions. Word has length 20 [2021-06-05 14:31:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:31,435 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1103 transitions. [2021-06-05 14:31:31,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1103 transitions. [2021-06-05 14:31:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:31,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:31,436 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:31,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,636 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:31,636 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-06-05 14:31:31,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:31,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836443583] [2021-06-05 14:31:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836443583] [2021-06-05 14:31:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836443583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460456928] [2021-06-05 14:31:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460456928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:31,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261239698] [2021-06-05 14:31:31,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:31,829 INFO L87 Difference]: Start difference. First operand 350 states and 1103 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:31,995 INFO L93 Difference]: Finished difference Result 422 states and 1263 transitions. [2021-06-05 14:31:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:31,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:31,995 INFO L225 Difference]: With dead ends: 422 [2021-06-05 14:31:31,995 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:31:31,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:31:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-06-05 14:31:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1560693641618496) internal successors, (1092), 346 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1092 transitions. [2021-06-05 14:31:31,999 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1092 transitions. Word has length 20 [2021-06-05 14:31:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:32,000 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1092 transitions. [2021-06-05 14:31:32,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1092 transitions. [2021-06-05 14:31:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:32,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:32,000 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 14:31:32,201 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-06-05 14:31:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779876272] [2021-06-05 14:31:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779876272] [2021-06-05 14:31:32,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779876272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450259725] [2021-06-05 14:31:32,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450259725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:32,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:32,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318091797] [2021-06-05 14:31:32,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:32,413 INFO L87 Difference]: Start difference. First operand 347 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:32,636 INFO L93 Difference]: Finished difference Result 380 states and 1168 transitions. [2021-06-05 14:31:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:32,637 INFO L225 Difference]: With dead ends: 380 [2021-06-05 14:31:32,637 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:31:32,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:31:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 339. [2021-06-05 14:31:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 14:31:32,642 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 14:31:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:32,642 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 14:31:32,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 14:31:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:32,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:32,643 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 14:31:32,859 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-06-05 14:31:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430507173] [2021-06-05 14:31:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430507173] [2021-06-05 14:31:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430507173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751304106] [2021-06-05 14:31:32,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:33,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:33,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:33,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,027 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 14:31:33,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:33,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:33,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:31:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751304106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:33,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:31:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637825507] [2021-06-05 14:31:33,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:33,095 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:33,332 INFO L93 Difference]: Finished difference Result 550 states and 1646 transitions. [2021-06-05 14:31:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:33,333 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:31:33,333 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:31:33,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:31:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-05 14:31:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1597633136094676) internal successors, (1068), 338 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 14:31:33,337 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 14:31:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:33,337 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 14:31:33,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 14:31:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:33,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:33,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:33,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-06-05 14:31:33,545 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-06-05 14:31:33,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:33,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301440851] [2021-06-05 14:31:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301440851] [2021-06-05 14:31:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301440851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088651679] [2021-06-05 14:31:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:33,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:33,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:33,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:33,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:33,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,754 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:31:33,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:33,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088651679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:33,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:33,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035307540] [2021-06-05 14:31:33,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:33,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:33,791 INFO L87 Difference]: Start difference. First operand 339 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:34,008 INFO L93 Difference]: Finished difference Result 591 states and 1730 transitions. [2021-06-05 14:31:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:34,009 INFO L225 Difference]: With dead ends: 591 [2021-06-05 14:31:34,009 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:31:34,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:31:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 351. [2021-06-05 14:31:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1685714285714286) internal successors, (1109), 350 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1109 transitions. [2021-06-05 14:31:34,014 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1109 transitions. Word has length 20 [2021-06-05 14:31:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:34,014 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1109 transitions. [2021-06-05 14:31:34,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1109 transitions. [2021-06-05 14:31:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:34,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:34,014 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:34,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,215 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-06-05 14:31:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406308200] [2021-06-05 14:31:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406308200] [2021-06-05 14:31:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406308200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230500833] [2021-06-05 14:31:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:34,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:34,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:34,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:34,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:34,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,408 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:31:34,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:34,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230500833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:34,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:34,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127050446] [2021-06-05 14:31:34,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:34,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:34,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:34,452 INFO L87 Difference]: Start difference. First operand 351 states and 1109 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:34,615 INFO L93 Difference]: Finished difference Result 643 states and 1851 transitions. [2021-06-05 14:31:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:34,616 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:31:34,616 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 14:31:34,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 14:31:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 357. [2021-06-05 14:31:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1853932584269664) internal successors, (1134), 356 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1134 transitions. [2021-06-05 14:31:34,621 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1134 transitions. Word has length 20 [2021-06-05 14:31:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:34,621 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1134 transitions. [2021-06-05 14:31:34,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1134 transitions. [2021-06-05 14:31:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:34,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:34,622 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:34,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,822 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-06-05 14:31:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:34,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291937491] [2021-06-05 14:31:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:34,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291937491] [2021-06-05 14:31:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291937491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915980298] [2021-06-05 14:31:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:34,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,013 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 14:31:35,013 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:35,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:35,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:35,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,035 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:35,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:35,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:31:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915980298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:35,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901099715] [2021-06-05 14:31:35,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:35,074 INFO L87 Difference]: Start difference. First operand 357 states and 1134 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:35,238 INFO L93 Difference]: Finished difference Result 600 states and 1742 transitions. [2021-06-05 14:31:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:35,239 INFO L225 Difference]: With dead ends: 600 [2021-06-05 14:31:35,239 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:31:35,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:31:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 355. [2021-06-05 14:31:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.172316384180791) internal successors, (1123), 354 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1123 transitions. [2021-06-05 14:31:35,244 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1123 transitions. Word has length 20 [2021-06-05 14:31:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:35,244 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1123 transitions. [2021-06-05 14:31:35,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1123 transitions. [2021-06-05 14:31:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:35,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:35,245 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:35,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:35,457 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-06-05 14:31:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100844037] [2021-06-05 14:31:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100844037] [2021-06-05 14:31:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100844037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912771147] [2021-06-05 14:31:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:35,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:35,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:35,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:35,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:35,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:35,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,626 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:31:35,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:35,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 14:31:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912771147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:35,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:31:35,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342545359] [2021-06-05 14:31:35,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:35,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:35,677 INFO L87 Difference]: Start difference. First operand 355 states and 1123 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:35,881 INFO L93 Difference]: Finished difference Result 483 states and 1462 transitions. [2021-06-05 14:31:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:35,882 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:31:35,882 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 14:31:35,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 14:31:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 349. [2021-06-05 14:31:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 14:31:35,886 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 14:31:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:35,886 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 14:31:35,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 14:31:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:35,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:35,887 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,087 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-06-05 14:31:36,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869794167] [2021-06-05 14:31:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869794167] [2021-06-05 14:31:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869794167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273151030] [2021-06-05 14:31:36,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:36,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:36,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:36,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:36,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,275 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:31:36,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:36,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:36,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:36,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273151030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:36,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380465444] [2021-06-05 14:31:36,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:36,335 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:36,482 INFO L93 Difference]: Finished difference Result 544 states and 1608 transitions. [2021-06-05 14:31:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:36,483 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:31:36,483 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:31:36,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:31:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 339. [2021-06-05 14:31:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1449704142011834) internal successors, (1063), 338 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1063 transitions. [2021-06-05 14:31:36,487 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1063 transitions. Word has length 20 [2021-06-05 14:31:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1063 transitions. [2021-06-05 14:31:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1063 transitions. [2021-06-05 14:31:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:36,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:36,488 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 14:31:36,688 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,688 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-06-05 14:31:36,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008009217] [2021-06-05 14:31:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:36,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008009217] [2021-06-05 14:31:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008009217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343637164] [2021-06-05 14:31:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:36,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:36,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:36,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,887 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 14:31:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:36,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,924 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2021-06-05 14:31:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:36,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:36,949 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 14:31:36,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:36,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:31:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343637164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:37,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:37,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813486422] [2021-06-05 14:31:37,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:37,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:37,024 INFO L87 Difference]: Start difference. First operand 339 states and 1063 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:37,240 INFO L93 Difference]: Finished difference Result 540 states and 1592 transitions. [2021-06-05 14:31:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:37,241 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:31:37,241 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:31:37,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:31:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 342. [2021-06-05 14:31:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.161290322580645) internal successors, (1078), 341 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1078 transitions. [2021-06-05 14:31:37,246 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1078 transitions. Word has length 20 [2021-06-05 14:31:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:37,246 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1078 transitions. [2021-06-05 14:31:37,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1078 transitions. [2021-06-05 14:31:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:37,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:37,246 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:37,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 14:31:37,447 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-06-05 14:31:37,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:37,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803919753] [2021-06-05 14:31:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803919753] [2021-06-05 14:31:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803919753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98851982] [2021-06-05 14:31:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:37,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:37,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:37,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,662 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 14:31:37,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:37,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,690 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 14:31:37,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:37,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,709 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:37,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:37,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 14:31:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98851982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:37,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086964552] [2021-06-05 14:31:37,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:37,772 INFO L87 Difference]: Start difference. First operand 342 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:37,908 INFO L93 Difference]: Finished difference Result 478 states and 1449 transitions. [2021-06-05 14:31:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:37,909 INFO L225 Difference]: With dead ends: 478 [2021-06-05 14:31:37,909 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 14:31:37,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 14:31:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 333. [2021-06-05 14:31:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1295180722891565) internal successors, (1039), 332 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1039 transitions. [2021-06-05 14:31:37,913 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1039 transitions. Word has length 20 [2021-06-05 14:31:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:37,914 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1039 transitions. [2021-06-05 14:31:37,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1039 transitions. [2021-06-05 14:31:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:37,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:37,914 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable966 [2021-06-05 14:31:38,117 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-06-05 14:31:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987500359] [2021-06-05 14:31:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987500359] [2021-06-05 14:31:38,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987500359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038262049] [2021-06-05 14:31:38,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:38,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,316 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 14:31:38,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:38,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:38,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,349 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:38,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:38,349 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 14:31:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038262049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:38,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:38,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136017961] [2021-06-05 14:31:38,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:38,419 INFO L87 Difference]: Start difference. First operand 333 states and 1039 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:38,628 INFO L93 Difference]: Finished difference Result 588 states and 1733 transitions. [2021-06-05 14:31:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:38,629 INFO L225 Difference]: With dead ends: 588 [2021-06-05 14:31:38,629 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:31:38,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:31:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 341. [2021-06-05 14:31:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.161764705882353) internal successors, (1075), 340 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1075 transitions. [2021-06-05 14:31:38,634 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1075 transitions. Word has length 20 [2021-06-05 14:31:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:38,634 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1075 transitions. [2021-06-05 14:31:38,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1075 transitions. [2021-06-05 14:31:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:38,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:38,634 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,835 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-06-05 14:31:38,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338261654] [2021-06-05 14:31:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338261654] [2021-06-05 14:31:38,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338261654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505266094] [2021-06-05 14:31:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:38,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,016 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 14:31:39,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:39,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:39,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,039 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:39,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:39,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 14:31:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505266094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:39,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:39,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049434627] [2021-06-05 14:31:39,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:39,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:39,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:39,109 INFO L87 Difference]: Start difference. First operand 341 states and 1075 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:39,315 INFO L93 Difference]: Finished difference Result 574 states and 1682 transitions. [2021-06-05 14:31:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:39,316 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:31:39,316 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:31:39,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:31:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-06-05 14:31:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.139941690962099) internal successors, (1077), 343 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1077 transitions. [2021-06-05 14:31:39,321 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1077 transitions. Word has length 20 [2021-06-05 14:31:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:39,321 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1077 transitions. [2021-06-05 14:31:39,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1077 transitions. [2021-06-05 14:31:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:39,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:39,321 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:39,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:39,522 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-06-05 14:31:39,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:39,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538875448] [2021-06-05 14:31:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538875448] [2021-06-05 14:31:39,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538875448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560532241] [2021-06-05 14:31:39,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:39,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:39,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:39,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:39,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,717 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 14:31:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:39,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:39,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:39,741 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:31:39,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:39,741 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:31:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560532241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:39,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:39,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967607115] [2021-06-05 14:31:39,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:39,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:39,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:39,819 INFO L87 Difference]: Start difference. First operand 344 states and 1077 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:40,105 INFO L93 Difference]: Finished difference Result 619 states and 1797 transitions. [2021-06-05 14:31:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:40,107 INFO L225 Difference]: With dead ends: 619 [2021-06-05 14:31:40,107 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 14:31:40,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 14:31:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 337. [2021-06-05 14:31:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1517857142857144) internal successors, (1059), 336 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1059 transitions. [2021-06-05 14:31:40,111 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1059 transitions. Word has length 20 [2021-06-05 14:31:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,111 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1059 transitions. [2021-06-05 14:31:40,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1059 transitions. [2021-06-05 14:31:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:40,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,112 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 14:31:40,312 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-06-05 14:31:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556276789] [2021-06-05 14:31:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556276789] [2021-06-05 14:31:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556276789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434744126] [2021-06-05 14:31:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:40,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:40,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,492 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 14:31:40,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:40,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:40,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,514 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:40,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:40,515 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 14:31:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434744126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:40,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:40,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721379692] [2021-06-05 14:31:40,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:40,587 INFO L87 Difference]: Start difference. First operand 337 states and 1059 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:40,762 INFO L93 Difference]: Finished difference Result 553 states and 1649 transitions. [2021-06-05 14:31:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:40,763 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:31:40,763 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:31:40,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:31:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 334. [2021-06-05 14:31:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.135135135135135) internal successors, (1044), 333 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1044 transitions. [2021-06-05 14:31:40,767 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1044 transitions. Word has length 20 [2021-06-05 14:31:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,767 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1044 transitions. [2021-06-05 14:31:40,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1044 transitions. [2021-06-05 14:31:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:40,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,768 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 14:31:40,969 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-06-05 14:31:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160467423] [2021-06-05 14:31:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:41,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160467423] [2021-06-05 14:31:41,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160467423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818521071] [2021-06-05 14:31:41,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:41,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:41,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,139 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 14:31:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:41,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:41,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:41,149 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 14:31:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818521071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:41,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:41,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255887064] [2021-06-05 14:31:41,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:41,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:41,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:41,220 INFO L87 Difference]: Start difference. First operand 334 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:41,454 INFO L93 Difference]: Finished difference Result 525 states and 1551 transitions. [2021-06-05 14:31:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:41,455 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:31:41,455 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 14:31:41,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 14:31:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 344. [2021-06-05 14:31:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.122448979591837) internal successors, (1071), 343 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1071 transitions. [2021-06-05 14:31:41,460 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1071 transitions. Word has length 20 [2021-06-05 14:31:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:41,460 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1071 transitions. [2021-06-05 14:31:41,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1071 transitions. [2021-06-05 14:31:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:41,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:41,460 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:41,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,671 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:41,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-06-05 14:31:41,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:41,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743396781] [2021-06-05 14:31:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743396781] [2021-06-05 14:31:41,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743396781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865629528] [2021-06-05 14:31:41,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:41,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:41,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:41,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:41,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,848 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 14:31:41,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:41,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:41,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:41,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:41,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:31:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865629528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:41,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:41,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742597943] [2021-06-05 14:31:41,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:41,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:41,925 INFO L87 Difference]: Start difference. First operand 344 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:42,079 INFO L93 Difference]: Finished difference Result 496 states and 1497 transitions. [2021-06-05 14:31:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:42,080 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:31:42,080 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:31:42,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:31:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 331. [2021-06-05 14:31:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.124242424242424) internal successors, (1031), 330 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1031 transitions. [2021-06-05 14:31:42,084 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1031 transitions. Word has length 20 [2021-06-05 14:31:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:42,085 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1031 transitions. [2021-06-05 14:31:42,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1031 transitions. [2021-06-05 14:31:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:42,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:42,085 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:42,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 14:31:42,297 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-06-05 14:31:42,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:42,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566642311] [2021-06-05 14:31:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566642311] [2021-06-05 14:31:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566642311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841188535] [2021-06-05 14:31:42,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:42,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841188535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388850157] [2021-06-05 14:31:42,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:42,541 INFO L87 Difference]: Start difference. First operand 331 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:42,733 INFO L93 Difference]: Finished difference Result 417 states and 1251 transitions. [2021-06-05 14:31:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:42,734 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:31:42,734 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 14:31:42,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 14:31:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 338. [2021-06-05 14:31:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1394658753709197) internal successors, (1058), 337 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1058 transitions. [2021-06-05 14:31:42,738 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1058 transitions. Word has length 20 [2021-06-05 14:31:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:42,738 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1058 transitions. [2021-06-05 14:31:42,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1058 transitions. [2021-06-05 14:31:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:42,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:42,738 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:42,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 14:31:42,939 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-06-05 14:31:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:42,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631389] [2021-06-05 14:31:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:42,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631389] [2021-06-05 14:31:42,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915192463] [2021-06-05 14:31:42,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915192463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:43,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893256245] [2021-06-05 14:31:43,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:43,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:43,170 INFO L87 Difference]: Start difference. First operand 338 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,389 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:31:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:43,445 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-05 14:31:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:43,446 INFO L225 Difference]: With dead ends: 423 [2021-06-05 14:31:43,446 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 14:31:43,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 14:31:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 335. [2021-06-05 14:31:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1347305389221556) internal successors, (1047), 334 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1047 transitions. [2021-06-05 14:31:43,450 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1047 transitions. Word has length 20 [2021-06-05 14:31:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:43,450 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1047 transitions. [2021-06-05 14:31:43,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1047 transitions. [2021-06-05 14:31:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:43,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:43,451 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:43,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,667 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-06-05 14:31:43,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:43,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799723481] [2021-06-05 14:31:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:43,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799723481] [2021-06-05 14:31:43,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799723481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493859824] [2021-06-05 14:31:43,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:43,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493859824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:43,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:43,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940928159] [2021-06-05 14:31:43,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:43,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:43,931 INFO L87 Difference]: Start difference. First operand 335 states and 1047 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,168 INFO L93 Difference]: Finished difference Result 387 states and 1176 transitions. [2021-06-05 14:31:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,169 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:31:44,169 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 14:31:44,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 14:31:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 332. [2021-06-05 14:31:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1299093655589125) internal successors, (1036), 331 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 14:31:44,173 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 14:31:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,173 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 14:31:44,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 14:31:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:44,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,173 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:44,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:44,385 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-06-05 14:31:44,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:44,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495157648] [2021-06-05 14:31:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:44,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495157648] [2021-06-05 14:31:44,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495157648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191958201] [2021-06-05 14:31:44,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:44,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191958201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127713787] [2021-06-05 14:31:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:44,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:44,635 INFO L87 Difference]: Start difference. First operand 332 states and 1036 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,875 INFO L93 Difference]: Finished difference Result 501 states and 1461 transitions. [2021-06-05 14:31:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:44,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,876 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:31:44,876 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 14:31:44,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 14:31:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 340. [2021-06-05 14:31:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.162241887905605) internal successors, (1072), 339 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1072 transitions. [2021-06-05 14:31:44,889 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1072 transitions. Word has length 20 [2021-06-05 14:31:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,889 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1072 transitions. [2021-06-05 14:31:44,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1072 transitions. [2021-06-05 14:31:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:44,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,889 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:45,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,105 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-06-05 14:31:45,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:45,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780866012] [2021-06-05 14:31:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780866012] [2021-06-05 14:31:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780866012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221958451] [2021-06-05 14:31:45,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221958451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:45,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:45,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201103225] [2021-06-05 14:31:45,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:45,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:45,330 INFO L87 Difference]: Start difference. First operand 340 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:45,644 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 14:31:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:45,645 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:31:45,645 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 14:31:45,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 14:31:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 343. [2021-06-05 14:31:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1403508771929824) internal successors, (1074), 342 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1074 transitions. [2021-06-05 14:31:45,649 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1074 transitions. Word has length 20 [2021-06-05 14:31:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:45,649 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1074 transitions. [2021-06-05 14:31:45,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1074 transitions. [2021-06-05 14:31:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:45,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:45,650 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:45,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,850 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-06-05 14:31:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:45,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672142392] [2021-06-05 14:31:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672142392] [2021-06-05 14:31:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672142392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774629969] [2021-06-05 14:31:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774629969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:46,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655145467] [2021-06-05 14:31:46,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:46,069 INFO L87 Difference]: Start difference. First operand 343 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,298 INFO L93 Difference]: Finished difference Result 498 states and 1448 transitions. [2021-06-05 14:31:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,299 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:31:46,299 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:31:46,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:31:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 336. [2021-06-05 14:31:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.1522388059701494) internal successors, (1056), 335 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1056 transitions. [2021-06-05 14:31:46,303 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1056 transitions. Word has length 20 [2021-06-05 14:31:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,303 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1056 transitions. [2021-06-05 14:31:46,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1056 transitions. [2021-06-05 14:31:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:46,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,304 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:46,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 14:31:46,504 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-06-05 14:31:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:46,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073323505] [2021-06-05 14:31:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:46,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073323505] [2021-06-05 14:31:46,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073323505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002349061] [2021-06-05 14:31:46,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:46,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002349061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:46,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:46,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303310927] [2021-06-05 14:31:46,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:46,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:46,727 INFO L87 Difference]: Start difference. First operand 336 states and 1056 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,895 INFO L93 Difference]: Finished difference Result 432 states and 1300 transitions. [2021-06-05 14:31:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,896 INFO L225 Difference]: With dead ends: 432 [2021-06-05 14:31:46,896 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 14:31:46,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 14:31:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 333. [2021-06-05 14:31:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1355421686746987) internal successors, (1041), 332 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1041 transitions. [2021-06-05 14:31:46,900 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1041 transitions. Word has length 20 [2021-06-05 14:31:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,900 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1041 transitions. [2021-06-05 14:31:46,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1041 transitions. [2021-06-05 14:31:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:46,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,901 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:47,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,101 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-06-05 14:31:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560729047] [2021-06-05 14:31:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560729047] [2021-06-05 14:31:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560729047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199496791] [2021-06-05 14:31:47,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199496791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:47,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:47,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162766513] [2021-06-05 14:31:47,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:47,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:47,324 INFO L87 Difference]: Start difference. First operand 333 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:47,706 INFO L93 Difference]: Finished difference Result 475 states and 1389 transitions. [2021-06-05 14:31:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:47,707 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:31:47,707 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:31:47,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:31:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-06-05 14:31:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1228070175438596) internal successors, (1068), 342 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-06-05 14:31:47,715 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-06-05 14:31:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:47,715 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-06-05 14:31:47,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-06-05 14:31:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:47,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:47,715 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:47,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,916 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-06-05 14:31:47,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:47,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858576800] [2021-06-05 14:31:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:47,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858576800] [2021-06-05 14:31:47,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858576800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951483709] [2021-06-05 14:31:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:48,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951483709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:48,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962854606] [2021-06-05 14:31:48,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:48,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:48,139 INFO L87 Difference]: Start difference. First operand 343 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:48,428 INFO L93 Difference]: Finished difference Result 446 states and 1335 transitions. [2021-06-05 14:31:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:48,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:48,429 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:31:48,429 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:31:48,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:31:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-06-05 14:31:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1299093655589125) internal successors, (1036), 331 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 14:31:48,433 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 14:31:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:48,433 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 14:31:48,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 14:31:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:48,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:48,434 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:48,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,634 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-06-05 14:31:48,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:48,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705688320] [2021-06-05 14:31:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705688320] [2021-06-05 14:31:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705688320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178479014] [2021-06-05 14:31:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178479014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:48,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282870944] [2021-06-05 14:31:48,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:48,865 INFO L87 Difference]: Start difference. First operand 332 states and 1036 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,120 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-06-05 14:31:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,121 INFO L225 Difference]: With dead ends: 378 [2021-06-05 14:31:49,121 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:31:49,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:31:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 334. [2021-06-05 14:31:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.126126126126126) internal successors, (1041), 333 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 14:31:49,125 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 14:31:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,125 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 14:31:49,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 14:31:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:49,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,125 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:49,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-05 14:31:49,326 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-06-05 14:31:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:49,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402731303] [2021-06-05 14:31:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:49,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402731303] [2021-06-05 14:31:49,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402731303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539641836] [2021-06-05 14:31:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:49,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539641836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:49,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:49,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474694480] [2021-06-05 14:31:49,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:49,549 INFO L87 Difference]: Start difference. First operand 334 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,824 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 14:31:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,825 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:31:49,825 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:31:49,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:31:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 344. [2021-06-05 14:31:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1137026239067054) internal successors, (1068), 343 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-06-05 14:31:49,829 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-06-05 14:31:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,829 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-06-05 14:31:49,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-06-05 14:31:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:49,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,830 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:50,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 14:31:50,045 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-06-05 14:31:50,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:50,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191812145] [2021-06-05 14:31:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191812145] [2021-06-05 14:31:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191812145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733129633] [2021-06-05 14:31:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733129633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:50,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:50,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093429278] [2021-06-05 14:31:50,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:50,274 INFO L87 Difference]: Start difference. First operand 344 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:50,504 INFO L93 Difference]: Finished difference Result 374 states and 1150 transitions. [2021-06-05 14:31:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:50,505 INFO L225 Difference]: With dead ends: 374 [2021-06-05 14:31:50,505 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 14:31:50,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 14:31:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 329. [2021-06-05 14:31:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1189024390243905) internal successors, (1023), 328 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1023 transitions. [2021-06-05 14:31:50,509 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1023 transitions. Word has length 20 [2021-06-05 14:31:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:50,509 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1023 transitions. [2021-06-05 14:31:50,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1023 transitions. [2021-06-05 14:31:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:50,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:50,509 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:50,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-06-05 14:31:50,710 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash 657164802, now seen corresponding path program 110 times [2021-06-05 14:31:50,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:50,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373230764] [2021-06-05 14:31:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373230764] [2021-06-05 14:31:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373230764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197393709] [2021-06-05 14:31:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:50,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:50,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:50,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:50,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,892 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 14:31:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:50,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,916 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:31:50,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:50,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 14:31:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197393709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:50,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:31:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443376194] [2021-06-05 14:31:50,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:50,972 INFO L87 Difference]: Start difference. First operand 329 states and 1023 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:51,257 INFO L93 Difference]: Finished difference Result 421 states and 1257 transitions. [2021-06-05 14:31:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:51,258 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:31:51,258 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:31:51,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:31:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2021-06-05 14:31:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0865384615384617) internal successors, (963), 312 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 963 transitions. [2021-06-05 14:31:51,261 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 963 transitions. Word has length 20 [2021-06-05 14:31:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:51,261 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 963 transitions. [2021-06-05 14:31:51,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 963 transitions. [2021-06-05 14:31:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:51,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:51,261 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:51,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:51,462 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-06-05 14:31:51,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:51,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230024711] [2021-06-05 14:31:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:51,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:51,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230024711] [2021-06-05 14:31:51,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230024711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22957740] [2021-06-05 14:31:51,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:51,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:51,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:51,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,635 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 14:31:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:51,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:51,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:51,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,670 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 14:31:51,670 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:51,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:51,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 14:31:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22957740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082160165] [2021-06-05 14:31:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:51,708 INFO L87 Difference]: Start difference. First operand 313 states and 963 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:51,857 INFO L93 Difference]: Finished difference Result 488 states and 1442 transitions. [2021-06-05 14:31:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:51,858 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:31:51,858 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:31:51,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:31:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-06-05 14:31:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1097560975609757) internal successors, (1020), 328 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1020 transitions. [2021-06-05 14:31:51,862 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1020 transitions. Word has length 20 [2021-06-05 14:31:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:51,862 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1020 transitions. [2021-06-05 14:31:51,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1020 transitions. [2021-06-05 14:31:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:51,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:51,863 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,077 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-06-05 14:31:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666140028] [2021-06-05 14:31:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666140028] [2021-06-05 14:31:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666140028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727992457] [2021-06-05 14:31:52,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:52,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:52,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:52,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:52,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,227 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:31:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:52,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:52,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:52,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727992457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630372950] [2021-06-05 14:31:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:52,277 INFO L87 Difference]: Start difference. First operand 329 states and 1020 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:52,426 INFO L93 Difference]: Finished difference Result 540 states and 1563 transitions. [2021-06-05 14:31:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:52,427 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:31:52,427 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:31:52,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:31:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 335. [2021-06-05 14:31:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 14:31:52,431 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 14:31:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:52,431 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 14:31:52,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 14:31:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:52,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:52,432 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,633 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-06-05 14:31:52,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933246737] [2021-06-05 14:31:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933246737] [2021-06-05 14:31:52,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933246737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141065395] [2021-06-05 14:31:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:52,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,853 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 14:31:52,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:52,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,883 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:31:52,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 14:31:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:52,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:52,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,912 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:52,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:52,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:31:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141065395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:52,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642536675] [2021-06-05 14:31:52,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:52,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:52,954 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,087 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2021-06-05 14:31:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,088 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:31:53,088 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:31:53,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:31:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2021-06-05 14:31:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1144578313253013) internal successors, (1034), 332 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 14:31:53,092 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 14:31:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,092 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 14:31:53,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 14:31:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:53,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,093 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,293 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 114 times [2021-06-05 14:31:53,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577495574] [2021-06-05 14:31:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577495574] [2021-06-05 14:31:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577495574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998486368] [2021-06-05 14:31:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:53,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:53,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:53,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:53,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,504 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:31:53,504 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 14:31:53,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:53,504 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998486368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:53,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:53,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476372735] [2021-06-05 14:31:53,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:53,553 INFO L87 Difference]: Start difference. First operand 333 states and 1034 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,696 INFO L93 Difference]: Finished difference Result 600 states and 1752 transitions. [2021-06-05 14:31:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,697 INFO L225 Difference]: With dead ends: 600 [2021-06-05 14:31:53,697 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:31:53,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:31:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 339. [2021-06-05 14:31:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1301775147928996) internal successors, (1058), 338 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1058 transitions. [2021-06-05 14:31:53,702 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1058 transitions. Word has length 20 [2021-06-05 14:31:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,702 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1058 transitions. [2021-06-05 14:31:53,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1058 transitions. [2021-06-05 14:31:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:53,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,702 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,903 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 115 times [2021-06-05 14:31:53,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778639564] [2021-06-05 14:31:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778639564] [2021-06-05 14:31:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778639564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846927841] [2021-06-05 14:31:53,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:54,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,078 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:31:54,079 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 14:31:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:54,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,100 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:54,101 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-06-05 14:31:54,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:54,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:31:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846927841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:54,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248309054] [2021-06-05 14:31:54,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:54,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:54,164 INFO L87 Difference]: Start difference. First operand 339 states and 1058 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:54,321 INFO L93 Difference]: Finished difference Result 567 states and 1670 transitions. [2021-06-05 14:31:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:54,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:54,322 INFO L225 Difference]: With dead ends: 567 [2021-06-05 14:31:54,322 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:31:54,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:31:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 342. [2021-06-05 14:31:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1466275659824046) internal successors, (1073), 341 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1073 transitions. [2021-06-05 14:31:54,327 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1073 transitions. Word has length 20 [2021-06-05 14:31:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:54,327 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1073 transitions. [2021-06-05 14:31:54,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1073 transitions. [2021-06-05 14:31:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:54,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:54,327 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,528 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 116 times [2021-06-05 14:31:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:54,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73250482] [2021-06-05 14:31:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73250482] [2021-06-05 14:31:54,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73250482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590506525] [2021-06-05 14:31:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:54,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:54,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:54,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,707 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 14:31:54,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:54,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:54,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,729 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:31:54,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:54,730 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:31:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590506525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077916951] [2021-06-05 14:31:54,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:54,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:54,789 INFO L87 Difference]: Start difference. First operand 342 states and 1073 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:54,929 INFO L93 Difference]: Finished difference Result 534 states and 1593 transitions. [2021-06-05 14:31:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:54,930 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:31:54,930 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:31:54,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:31:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 333. [2021-06-05 14:31:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.1144578313253013) internal successors, (1034), 332 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 14:31:54,934 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 14:31:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:54,934 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 14:31:54,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 14:31:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:54,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:54,934 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 14:31:55,135 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 117 times [2021-06-05 14:31:55,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710401264] [2021-06-05 14:31:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:55,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710401264] [2021-06-05 14:31:55,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710401264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571536333] [2021-06-05 14:31:55,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:55,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:55,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:55,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,288 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:31:55,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:55,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:55,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:55,299 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571536333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:55,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130064810] [2021-06-05 14:31:55,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:55,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:55,365 INFO L87 Difference]: Start difference. First operand 333 states and 1034 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:55,549 INFO L93 Difference]: Finished difference Result 613 states and 1774 transitions. [2021-06-05 14:31:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:55,550 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:31:55,550 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 14:31:55,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 14:31:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 341. [2021-06-05 14:31:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1470588235294117) internal successors, (1070), 340 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1070 transitions. [2021-06-05 14:31:55,555 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1070 transitions. Word has length 20 [2021-06-05 14:31:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:55,555 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1070 transitions. [2021-06-05 14:31:55,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1070 transitions. [2021-06-05 14:31:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:55,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:55,556 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,771 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 118 times [2021-06-05 14:31:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211902506] [2021-06-05 14:31:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:55,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211902506] [2021-06-05 14:31:55,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211902506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872781204] [2021-06-05 14:31:55,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:55,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:55,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:55,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:55,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:55,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,959 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:31:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:55,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:55,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,979 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:55,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:55,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872781204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:56,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638951186] [2021-06-05 14:31:56,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:56,053 INFO L87 Difference]: Start difference. First operand 341 states and 1070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:56,238 INFO L93 Difference]: Finished difference Result 599 states and 1723 transitions. [2021-06-05 14:31:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:56,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:56,239 INFO L225 Difference]: With dead ends: 599 [2021-06-05 14:31:56,239 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 14:31:56,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 14:31:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 14:31:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 14:31:56,243 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 14:31:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:56,244 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 14:31:56,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 14:31:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:56,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:56,244 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:56,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,445 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 119 times [2021-06-05 14:31:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:56,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402276404] [2021-06-05 14:31:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402276404] [2021-06-05 14:31:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402276404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822969100] [2021-06-05 14:31:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:56,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:56,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:56,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:56,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,621 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 14:31:56,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:56,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,642 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 14:31:56,642 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 14:31:56,642 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:56,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:56,643 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:31:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822969100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839066094] [2021-06-05 14:31:56,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:56,713 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:56,882 INFO L93 Difference]: Finished difference Result 624 states and 1812 transitions. [2021-06-05 14:31:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:56,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:56,883 INFO L225 Difference]: With dead ends: 624 [2021-06-05 14:31:56,883 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 14:31:56,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 14:31:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 338. [2021-06-05 14:31:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.14540059347181) internal successors, (1060), 337 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1060 transitions. [2021-06-05 14:31:56,888 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1060 transitions. Word has length 20 [2021-06-05 14:31:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:56,888 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1060 transitions. [2021-06-05 14:31:56,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1060 transitions. [2021-06-05 14:31:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:56,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:56,888 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:57,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,089 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 120 times [2021-06-05 14:31:57,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:57,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910521974] [2021-06-05 14:31:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910521974] [2021-06-05 14:31:57,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910521974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836751623] [2021-06-05 14:31:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:57,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:57,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,270 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 14:31:57,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:57,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,301 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:31:57,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:57,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:57,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,322 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:57,322 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-06-05 14:31:57,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:57,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:31:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836751623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:57,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:57,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092663457] [2021-06-05 14:31:57,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:57,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:57,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:57,392 INFO L87 Difference]: Start difference. First operand 338 states and 1060 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:57,588 INFO L93 Difference]: Finished difference Result 593 states and 1745 transitions. [2021-06-05 14:31:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:57,593 INFO L225 Difference]: With dead ends: 593 [2021-06-05 14:31:57,593 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 14:31:57,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 14:31:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 14:31:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.12874251497006) internal successors, (1045), 334 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 14:31:57,597 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 14:31:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:57,597 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 14:31:57,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 14:31:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:57,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:57,597 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:57,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,803 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 121 times [2021-06-05 14:31:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:57,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736102356] [2021-06-05 14:31:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736102356] [2021-06-05 14:31:57,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736102356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713710148] [2021-06-05 14:31:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:57,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:57,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,976 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 14:31:57,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 14:31:57,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:57,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:57,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,997 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:31:57,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:57,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:31:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713710148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403695746] [2021-06-05 14:31:58,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:58,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:58,065 INFO L87 Difference]: Start difference. First operand 335 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,219 INFO L93 Difference]: Finished difference Result 547 states and 1592 transitions. [2021-06-05 14:31:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,219 INFO L225 Difference]: With dead ends: 547 [2021-06-05 14:31:58,219 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 14:31:58,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 14:31:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 339. [2021-06-05 14:31:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.133136094674556) internal successors, (1059), 338 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1059 transitions. [2021-06-05 14:31:58,223 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1059 transitions. Word has length 20 [2021-06-05 14:31:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,224 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1059 transitions. [2021-06-05 14:31:58,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1059 transitions. [2021-06-05 14:31:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:58,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,224 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:58,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,425 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 122 times [2021-06-05 14:31:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:58,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250983410] [2021-06-05 14:31:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:58,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250983410] [2021-06-05 14:31:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250983410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413746882] [2021-06-05 14:31:58,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:58,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:58,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,606 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 14:31:58,606 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-05 14:31:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:31:58,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:58,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,629 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:31:58,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:58,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 14:31:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413746882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861251011] [2021-06-05 14:31:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:58,696 INFO L87 Difference]: Start difference. First operand 339 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,852 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-06-05 14:31:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,853 INFO L225 Difference]: With dead ends: 530 [2021-06-05 14:31:58,853 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:31:58,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:31:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 334. [2021-06-05 14:31:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.126126126126126) internal successors, (1041), 333 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 14:31:58,857 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 14:31:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,858 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 14:31:58,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 14:31:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:58,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,858 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:59,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,058 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 123 times [2021-06-05 14:31:59,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:59,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706694113] [2021-06-05 14:31:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:59,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706694113] [2021-06-05 14:31:59,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706694113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209840698] [2021-06-05 14:31:59,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:59,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:59,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:59,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:59,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,221 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:31:59,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:59,222 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:31:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209840698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727247320] [2021-06-05 14:31:59,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:59,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:59,247 INFO L87 Difference]: Start difference. First operand 334 states and 1041 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:59,390 INFO L93 Difference]: Finished difference Result 483 states and 1452 transitions. [2021-06-05 14:31:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:59,391 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:31:59,391 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 14:31:59,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 14:31:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-06-05 14:31:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1160714285714284) internal successors, (1047), 336 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1047 transitions. [2021-06-05 14:31:59,395 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1047 transitions. Word has length 20 [2021-06-05 14:31:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:59,395 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1047 transitions. [2021-06-05 14:31:59,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1047 transitions. [2021-06-05 14:31:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:59,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:59,395 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:59,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1309 [2021-06-05 14:31:59,596 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 124 times [2021-06-05 14:31:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:59,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380043546] [2021-06-05 14:31:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380043546] [2021-06-05 14:31:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380043546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120335840] [2021-06-05 14:31:59,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:59,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:59,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:59,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,736 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:31:59,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:59,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:31:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120335840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001290759] [2021-06-05 14:31:59,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:59,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:59,785 INFO L87 Difference]: Start difference. First operand 337 states and 1047 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:59,911 INFO L93 Difference]: Finished difference Result 487 states and 1444 transitions. [2021-06-05 14:31:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:31:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:59,912 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:31:59,912 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:31:59,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:31:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 336. [2021-06-05 14:31:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.1104477611940298) internal successors, (1042), 335 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1042 transitions. [2021-06-05 14:31:59,915 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1042 transitions. Word has length 20 [2021-06-05 14:31:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:59,916 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1042 transitions. [2021-06-05 14:31:59,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1042 transitions. [2021-06-05 14:31:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:31:59,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:59,916 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1315,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,129 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 125 times [2021-06-05 14:32:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151787631] [2021-06-05 14:32:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151787631] [2021-06-05 14:32:00,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151787631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838047517] [2021-06-05 14:32:00,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:00,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:00,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,269 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:32:00,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:00,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:32:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838047517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590996875] [2021-06-05 14:32:00,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:00,314 INFO L87 Difference]: Start difference. First operand 336 states and 1042 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:00,427 INFO L93 Difference]: Finished difference Result 444 states and 1347 transitions. [2021-06-05 14:32:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:00,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:00,428 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:32:00,428 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 14:32:00,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 14:32:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 319. [2021-06-05 14:32:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0849056603773586) internal successors, (981), 318 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 981 transitions. [2021-06-05 14:32:00,432 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 981 transitions. Word has length 20 [2021-06-05 14:32:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:00,432 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 981 transitions. [2021-06-05 14:32:00,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 981 transitions. [2021-06-05 14:32:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:00,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,432 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 14:32:00,636 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 126 times [2021-06-05 14:32:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971124076] [2021-06-05 14:32:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971124076] [2021-06-05 14:32:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971124076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386072732] [2021-06-05 14:32:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:00,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386072732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321809989] [2021-06-05 14:32:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:00,799 INFO L87 Difference]: Start difference. First operand 319 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:00,910 INFO L93 Difference]: Finished difference Result 397 states and 1189 transitions. [2021-06-05 14:32:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:00,911 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:32:00,911 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:32:00,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:32:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 325. [2021-06-05 14:32:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.111111111111111) internal successors, (1008), 324 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1008 transitions. [2021-06-05 14:32:00,914 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1008 transitions. Word has length 20 [2021-06-05 14:32:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:00,915 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 1008 transitions. [2021-06-05 14:32:00,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1008 transitions. [2021-06-05 14:32:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:00,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,915 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:01,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-05 14:32:01,129 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 127 times [2021-06-05 14:32:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:01,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236150198] [2021-06-05 14:32:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:01,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236150198] [2021-06-05 14:32:01,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236150198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294019219] [2021-06-05 14:32:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294019219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:01,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016304061] [2021-06-05 14:32:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:01,286 INFO L87 Difference]: Start difference. First operand 325 states and 1008 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:01,388 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 14:32:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:01,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:01,388 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:32:01,388 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:32:01,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:32:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-06-05 14:32:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.0934579439252334) internal successors, (993), 321 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 993 transitions. [2021-06-05 14:32:01,392 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 993 transitions. Word has length 20 [2021-06-05 14:32:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:01,392 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 993 transitions. [2021-06-05 14:32:01,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 993 transitions. [2021-06-05 14:32:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:01,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:01,392 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:01,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 14:32:01,601 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 128 times [2021-06-05 14:32:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:01,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789454902] [2021-06-05 14:32:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789454902] [2021-06-05 14:32:01,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789454902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280096760] [2021-06-05 14:32:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280096760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406290376] [2021-06-05 14:32:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:01,762 INFO L87 Difference]: Start difference. First operand 322 states and 993 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:01,872 INFO L93 Difference]: Finished difference Result 361 states and 1097 transitions. [2021-06-05 14:32:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:01,873 INFO L225 Difference]: With dead ends: 361 [2021-06-05 14:32:01,873 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 14:32:01,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 14:32:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2021-06-05 14:32:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0825688073394497) internal successors, (1008), 327 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1008 transitions. [2021-06-05 14:32:01,876 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1008 transitions. Word has length 20 [2021-06-05 14:32:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:01,876 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 1008 transitions. [2021-06-05 14:32:01,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1008 transitions. [2021-06-05 14:32:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:01,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:01,877 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1342,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,077 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 129 times [2021-06-05 14:32:02,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966722946] [2021-06-05 14:32:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966722946] [2021-06-05 14:32:02,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966722946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207438488] [2021-06-05 14:32:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207438488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144634623] [2021-06-05 14:32:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:02,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:02,280 INFO L87 Difference]: Start difference. First operand 328 states and 1008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,407 INFO L93 Difference]: Finished difference Result 483 states and 1424 transitions. [2021-06-05 14:32:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,408 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:32:02,408 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 14:32:02,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 14:32:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 338. [2021-06-05 14:32:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1246290801186944) internal successors, (1053), 337 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-06-05 14:32:02,412 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-06-05 14:32:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,412 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-06-05 14:32:02,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-06-05 14:32:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:02,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,412 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-06-05 14:32:02,613 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 130 times [2021-06-05 14:32:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099906722] [2021-06-05 14:32:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099906722] [2021-06-05 14:32:02,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099906722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277729714] [2021-06-05 14:32:02,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:02,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277729714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706232828] [2021-06-05 14:32:02,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:02,816 INFO L87 Difference]: Start difference. First operand 338 states and 1053 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,979 INFO L93 Difference]: Finished difference Result 469 states and 1373 transitions. [2021-06-05 14:32:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,980 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:32:02,980 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:32:02,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:32:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 14:32:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1029411764705883) internal successors, (1055), 340 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 14:32:02,984 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 14:32:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,984 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 14:32:02,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 14:32:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:02,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,985 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:03,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-06-05 14:32:03,185 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 131 times [2021-06-05 14:32:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656664046] [2021-06-05 14:32:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656664046] [2021-06-05 14:32:03,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656664046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222421550] [2021-06-05 14:32:03,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:03,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222421550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:03,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953759938] [2021-06-05 14:32:03,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:03,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:03,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:03,399 INFO L87 Difference]: Start difference. First operand 341 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:03,546 INFO L93 Difference]: Finished difference Result 540 states and 1571 transitions. [2021-06-05 14:32:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:03,547 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:32:03,547 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:32:03,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:32:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-06-05 14:32:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.119533527696793) internal successors, (1070), 343 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-06-05 14:32:03,552 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-06-05 14:32:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:03,552 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-06-05 14:32:03,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-06-05 14:32:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:03,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:03,552 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:03,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,753 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 132 times [2021-06-05 14:32:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:03,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639556786] [2021-06-05 14:32:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639556786] [2021-06-05 14:32:03,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639556786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521131890] [2021-06-05 14:32:03,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521131890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:03,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:03,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578854542] [2021-06-05 14:32:03,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:03,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:03,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:03,959 INFO L87 Difference]: Start difference. First operand 344 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:04,114 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2021-06-05 14:32:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:04,115 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:32:04,115 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:32:04,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:32:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-06-05 14:32:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1029411764705883) internal successors, (1055), 340 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 14:32:04,119 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 14:32:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:04,120 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 14:32:04,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 14:32:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:04,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:04,120 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:04,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1369,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,321 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 133 times [2021-06-05 14:32:04,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:04,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406459177] [2021-06-05 14:32:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406459177] [2021-06-05 14:32:04,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406459177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899058100] [2021-06-05 14:32:04,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:04,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899058100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:04,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:04,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784089779] [2021-06-05 14:32:04,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:04,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:04,543 INFO L87 Difference]: Start difference. First operand 341 states and 1055 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:04,719 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-06-05 14:32:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:04,720 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:32:04,720 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:32:04,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:32:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 345. [2021-06-05 14:32:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.1075581395348837) internal successors, (1069), 344 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1069 transitions. [2021-06-05 14:32:04,724 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1069 transitions. Word has length 20 [2021-06-05 14:32:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:04,724 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1069 transitions. [2021-06-05 14:32:04,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1069 transitions. [2021-06-05 14:32:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:04,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:04,725 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:04,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-05 14:32:04,925 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 134 times [2021-06-05 14:32:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:04,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086053446] [2021-06-05 14:32:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086053446] [2021-06-05 14:32:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086053446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550276256] [2021-06-05 14:32:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550276256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094404815] [2021-06-05 14:32:05,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:05,149 INFO L87 Difference]: Start difference. First operand 345 states and 1069 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,379 INFO L93 Difference]: Finished difference Result 512 states and 1473 transitions. [2021-06-05 14:32:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,380 INFO L225 Difference]: With dead ends: 512 [2021-06-05 14:32:05,380 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:32:05,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:32:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 342. [2021-06-05 14:32:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1055718475073313) internal successors, (1059), 341 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1059 transitions. [2021-06-05 14:32:05,384 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1059 transitions. Word has length 20 [2021-06-05 14:32:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,384 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1059 transitions. [2021-06-05 14:32:05,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1059 transitions. [2021-06-05 14:32:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:05,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,384 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:05,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-06-05 14:32:05,585 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 135 times [2021-06-05 14:32:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:05,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645330552] [2021-06-05 14:32:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:05,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645330552] [2021-06-05 14:32:05,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645330552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451427094] [2021-06-05 14:32:05,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451427094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904889362] [2021-06-05 14:32:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:05,794 INFO L87 Difference]: Start difference. First operand 342 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,959 INFO L93 Difference]: Finished difference Result 445 states and 1330 transitions. [2021-06-05 14:32:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,960 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:32:05,960 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:32:05,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:32:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 343. [2021-06-05 14:32:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1023391812865495) internal successors, (1061), 342 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 14:32:05,964 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 14:32:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,964 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 14:32:05,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 14:32:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:05,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,965 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:06,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-06-05 14:32:06,169 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 136 times [2021-06-05 14:32:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:06,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533676534] [2021-06-05 14:32:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533676534] [2021-06-05 14:32:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533676534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73106940] [2021-06-05 14:32:06,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73106940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383025756] [2021-06-05 14:32:06,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:06,377 INFO L87 Difference]: Start difference. First operand 343 states and 1061 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:06,576 INFO L93 Difference]: Finished difference Result 439 states and 1312 transitions. [2021-06-05 14:32:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:06,577 INFO L225 Difference]: With dead ends: 439 [2021-06-05 14:32:06,577 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:32:06,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:32:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 332. [2021-06-05 14:32:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.093655589123867) internal successors, (1024), 331 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1024 transitions. [2021-06-05 14:32:06,581 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1024 transitions. Word has length 20 [2021-06-05 14:32:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:06,581 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1024 transitions. [2021-06-05 14:32:06,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1024 transitions. [2021-06-05 14:32:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:06,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:06,582 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:06,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 14:32:06,782 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 137 times [2021-06-05 14:32:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:06,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549319074] [2021-06-05 14:32:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549319074] [2021-06-05 14:32:06,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549319074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384552172] [2021-06-05 14:32:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384552172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:06,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693264685] [2021-06-05 14:32:06,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:06,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:06,987 INFO L87 Difference]: Start difference. First operand 332 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,160 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 14:32:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,161 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:32:07,161 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:32:07,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:32:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2021-06-05 14:32:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0853658536585367) internal successors, (1012), 328 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1012 transitions. [2021-06-05 14:32:07,164 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1012 transitions. Word has length 20 [2021-06-05 14:32:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,165 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1012 transitions. [2021-06-05 14:32:07,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1012 transitions. [2021-06-05 14:32:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:07,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,165 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,365 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,366 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 138 times [2021-06-05 14:32:07,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752389336] [2021-06-05 14:32:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752389336] [2021-06-05 14:32:07,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752389336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127360414] [2021-06-05 14:32:07,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:07,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127360414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955444620] [2021-06-05 14:32:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:07,584 INFO L87 Difference]: Start difference. First operand 329 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,726 INFO L93 Difference]: Finished difference Result 407 states and 1195 transitions. [2021-06-05 14:32:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,727 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:32:07,727 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:32:07,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:32:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2021-06-05 14:32:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.073099415204678) internal successors, (1051), 342 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2021-06-05 14:32:07,731 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2021-06-05 14:32:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,731 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2021-06-05 14:32:07,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2021-06-05 14:32:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:07,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,731 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1412,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,932 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 139 times [2021-06-05 14:32:07,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448808893] [2021-06-05 14:32:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448808893] [2021-06-05 14:32:07,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448808893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336954439] [2021-06-05 14:32:07,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336954439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:08,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471667760] [2021-06-05 14:32:08,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:08,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:08,158 INFO L87 Difference]: Start difference. First operand 343 states and 1051 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,343 INFO L93 Difference]: Finished difference Result 413 states and 1216 transitions. [2021-06-05 14:32:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,344 INFO L225 Difference]: With dead ends: 413 [2021-06-05 14:32:08,344 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 14:32:08,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 14:32:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 341. [2021-06-05 14:32:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0764705882352943) internal successors, (1046), 340 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 14:32:08,348 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 14:32:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,348 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 14:32:08,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 14:32:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:08,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,348 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:08,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,549 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 140 times [2021-06-05 14:32:08,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:08,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71962309] [2021-06-05 14:32:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71962309] [2021-06-05 14:32:08,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71962309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072319868] [2021-06-05 14:32:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072319868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050057555] [2021-06-05 14:32:08,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:08,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:08,760 INFO L87 Difference]: Start difference. First operand 341 states and 1046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,925 INFO L93 Difference]: Finished difference Result 382 states and 1151 transitions. [2021-06-05 14:32:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,926 INFO L225 Difference]: With dead ends: 382 [2021-06-05 14:32:08,926 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 14:32:08,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 14:32:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2021-06-05 14:32:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.081818181818182) internal successors, (1017), 330 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1017 transitions. [2021-06-05 14:32:08,929 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1017 transitions. Word has length 20 [2021-06-05 14:32:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,929 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1017 transitions. [2021-06-05 14:32:08,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1017 transitions. [2021-06-05 14:32:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:08,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,930 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 14:32:09,130 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 141 times [2021-06-05 14:32:09,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232248068] [2021-06-05 14:32:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232248068] [2021-06-05 14:32:09,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232248068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511089477] [2021-06-05 14:32:09,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511089477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:09,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:09,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850433265] [2021-06-05 14:32:09,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:09,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:09,360 INFO L87 Difference]: Start difference. First operand 331 states and 1017 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:09,555 INFO L93 Difference]: Finished difference Result 406 states and 1204 transitions. [2021-06-05 14:32:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:09,556 INFO L225 Difference]: With dead ends: 406 [2021-06-05 14:32:09,556 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 14:32:09,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 14:32:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 339. [2021-06-05 14:32:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.100591715976331) internal successors, (1048), 338 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1048 transitions. [2021-06-05 14:32:09,569 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1048 transitions. Word has length 20 [2021-06-05 14:32:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:09,569 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1048 transitions. [2021-06-05 14:32:09,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1048 transitions. [2021-06-05 14:32:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:09,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:09,570 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 14:32:09,777 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 142 times [2021-06-05 14:32:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156727650] [2021-06-05 14:32:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156727650] [2021-06-05 14:32:09,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156727650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28783997] [2021-06-05 14:32:09,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:09,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28783997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:10,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791077867] [2021-06-05 14:32:10,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:10,003 INFO L87 Difference]: Start difference. First operand 339 states and 1048 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,194 INFO L93 Difference]: Finished difference Result 412 states and 1211 transitions. [2021-06-05 14:32:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,195 INFO L225 Difference]: With dead ends: 412 [2021-06-05 14:32:10,195 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 14:32:10,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 14:32:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 336. [2021-06-05 14:32:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0955223880597016) internal successors, (1037), 335 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 14:32:10,199 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 14:32:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,199 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 14:32:10,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 14:32:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:10,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,199 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-06-05 14:32:10,400 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 143 times [2021-06-05 14:32:10,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:10,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862751927] [2021-06-05 14:32:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:10,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862751927] [2021-06-05 14:32:10,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862751927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998444382] [2021-06-05 14:32:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:10,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:10,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998444382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:10,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137556236] [2021-06-05 14:32:10,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:10,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:10,635 INFO L87 Difference]: Start difference. First operand 336 states and 1037 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,860 INFO L93 Difference]: Finished difference Result 376 states and 1129 transitions. [2021-06-05 14:32:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,861 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:32:10,861 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 14:32:10,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 14:32:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 333. [2021-06-05 14:32:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0903614457831323) internal successors, (1026), 332 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 14:32:10,864 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 14:32:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,864 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 14:32:10,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 14:32:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:10,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,865 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-05 14:32:11,081 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 144 times [2021-06-05 14:32:11,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702397583] [2021-06-05 14:32:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702397583] [2021-06-05 14:32:11,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702397583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865074970] [2021-06-05 14:32:11,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865074970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:11,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:11,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075478630] [2021-06-05 14:32:11,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:11,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:11,383 INFO L87 Difference]: Start difference. First operand 333 states and 1026 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:11,618 INFO L93 Difference]: Finished difference Result 493 states and 1422 transitions. [2021-06-05 14:32:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:11,619 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:32:11,619 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:32:11,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:32:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 341. [2021-06-05 14:32:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.123529411764706) internal successors, (1062), 340 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1062 transitions. [2021-06-05 14:32:11,635 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1062 transitions. Word has length 20 [2021-06-05 14:32:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:11,636 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1062 transitions. [2021-06-05 14:32:11,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1062 transitions. [2021-06-05 14:32:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:11,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:11,636 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 14:32:11,852 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 145 times [2021-06-05 14:32:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328601217] [2021-06-05 14:32:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328601217] [2021-06-05 14:32:11,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328601217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680325672] [2021-06-05 14:32:11,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680325672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:12,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:12,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105146200] [2021-06-05 14:32:12,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:12,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:12,098 INFO L87 Difference]: Start difference. First operand 341 states and 1062 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:12,365 INFO L93 Difference]: Finished difference Result 499 states and 1423 transitions. [2021-06-05 14:32:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:12,366 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:32:12,366 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:32:12,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:32:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 344. [2021-06-05 14:32:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1020408163265305) internal successors, (1064), 343 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1064 transitions. [2021-06-05 14:32:12,370 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1064 transitions. Word has length 20 [2021-06-05 14:32:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:12,370 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1064 transitions. [2021-06-05 14:32:12,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1064 transitions. [2021-06-05 14:32:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:12,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:12,371 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:12,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 14:32:12,586 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 146 times [2021-06-05 14:32:12,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:12,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399389039] [2021-06-05 14:32:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:12,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399389039] [2021-06-05 14:32:12,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399389039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789025227] [2021-06-05 14:32:12,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:12,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789025227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:12,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579457937] [2021-06-05 14:32:12,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:12,931 INFO L87 Difference]: Start difference. First operand 344 states and 1064 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:13,055 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 14:32:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:13,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:13,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:13,056 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:32:13,056 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:32:13,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:32:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2021-06-05 14:32:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.113095238095238) internal successors, (1046), 336 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1046 transitions. [2021-06-05 14:32:13,063 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1046 transitions. Word has length 20 [2021-06-05 14:32:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:13,063 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1046 transitions. [2021-06-05 14:32:13,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1046 transitions. [2021-06-05 14:32:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:13,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:13,064 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:13,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-06-05 14:32:13,264 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 147 times [2021-06-05 14:32:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:13,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524679289] [2021-06-05 14:32:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:13,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524679289] [2021-06-05 14:32:13,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524679289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434229632] [2021-06-05 14:32:13,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:13,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434229632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:13,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:13,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300273165] [2021-06-05 14:32:13,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:13,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:13,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:13,524 INFO L87 Difference]: Start difference. First operand 337 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:13,694 INFO L93 Difference]: Finished difference Result 424 states and 1261 transitions. [2021-06-05 14:32:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:13,695 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:32:13,695 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:32:13,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:32:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 334. [2021-06-05 14:32:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.096096096096096) internal successors, (1031), 333 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1031 transitions. [2021-06-05 14:32:13,699 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1031 transitions. Word has length 20 [2021-06-05 14:32:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:13,699 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1031 transitions. [2021-06-05 14:32:13,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1031 transitions. [2021-06-05 14:32:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:13,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:13,700 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:13,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-06-05 14:32:13,900 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 148 times [2021-06-05 14:32:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671886992] [2021-06-05 14:32:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:13,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671886992] [2021-06-05 14:32:13,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671886992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488043082] [2021-06-05 14:32:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:14,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488043082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:14,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570498353] [2021-06-05 14:32:14,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:14,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:14,152 INFO L87 Difference]: Start difference. First operand 334 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:14,392 INFO L93 Difference]: Finished difference Result 461 states and 1335 transitions. [2021-06-05 14:32:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:14,392 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:32:14,392 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:32:14,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:32:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 344. [2021-06-05 14:32:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0845481049562684) internal successors, (1058), 343 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1058 transitions. [2021-06-05 14:32:14,396 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1058 transitions. Word has length 20 [2021-06-05 14:32:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:14,396 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1058 transitions. [2021-06-05 14:32:14,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1058 transitions. [2021-06-05 14:32:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:14,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:14,397 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:14,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-06-05 14:32:14,613 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 149 times [2021-06-05 14:32:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219373696] [2021-06-05 14:32:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:14,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219373696] [2021-06-05 14:32:14,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219373696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914005392] [2021-06-05 14:32:14,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:14,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914005392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:14,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644483235] [2021-06-05 14:32:14,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:14,831 INFO L87 Difference]: Start difference. First operand 344 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,043 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2021-06-05 14:32:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:15,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,044 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:32:15,044 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:32:15,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:32:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 333. [2021-06-05 14:32:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0903614457831323) internal successors, (1026), 332 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 14:32:15,048 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 14:32:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,048 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 14:32:15,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 14:32:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:15,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,048 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-06-05 14:32:15,250 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 150 times [2021-06-05 14:32:15,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812371474] [2021-06-05 14:32:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812371474] [2021-06-05 14:32:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812371474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134139982] [2021-06-05 14:32:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134139982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:15,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084368749] [2021-06-05 14:32:15,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:15,490 INFO L87 Difference]: Start difference. First operand 333 states and 1026 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,673 INFO L93 Difference]: Finished difference Result 378 states and 1133 transitions. [2021-06-05 14:32:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,674 INFO L225 Difference]: With dead ends: 378 [2021-06-05 14:32:15,674 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:32:15,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:32:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2021-06-05 14:32:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 14:32:15,677 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 14:32:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,677 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 14:32:15,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 14:32:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:15,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,678 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,878 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 151 times [2021-06-05 14:32:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129831712] [2021-06-05 14:32:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129831712] [2021-06-05 14:32:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129831712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448792200] [2021-06-05 14:32:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448792200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112742301] [2021-06-05 14:32:16,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:16,090 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:16,325 INFO L93 Difference]: Finished difference Result 403 states and 1185 transitions. [2021-06-05 14:32:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:16,326 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:32:16,326 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:32:16,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:32:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 345. [2021-06-05 14:32:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0755813953488373) internal successors, (1058), 344 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1058 transitions. [2021-06-05 14:32:16,330 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1058 transitions. Word has length 20 [2021-06-05 14:32:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:16,330 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1058 transitions. [2021-06-05 14:32:16,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1058 transitions. [2021-06-05 14:32:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:16,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:16,330 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:16,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,531 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 152 times [2021-06-05 14:32:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:16,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216542633] [2021-06-05 14:32:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:16,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216542633] [2021-06-05 14:32:16,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216542633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757243300] [2021-06-05 14:32:16,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757243300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:16,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917390262] [2021-06-05 14:32:16,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:16,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:16,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:16,763 INFO L87 Difference]: Start difference. First operand 345 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:16,911 INFO L93 Difference]: Finished difference Result 374 states and 1131 transitions. [2021-06-05 14:32:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:16,912 INFO L225 Difference]: With dead ends: 374 [2021-06-05 14:32:16,912 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 14:32:16,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 14:32:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-06-05 14:32:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.084592145015106) internal successors, (1021), 331 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 14:32:16,915 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 14:32:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 14:32:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 14:32:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:16,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:16,916 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-06-05 14:32:17,116 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 153 times [2021-06-05 14:32:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996673825] [2021-06-05 14:32:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996673825] [2021-06-05 14:32:17,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996673825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78299770] [2021-06-05 14:32:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78299770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947597461] [2021-06-05 14:32:17,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:17,315 INFO L87 Difference]: Start difference. First operand 332 states and 1021 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:17,466 INFO L93 Difference]: Finished difference Result 451 states and 1333 transitions. [2021-06-05 14:32:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:17,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:17,467 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:32:17,467 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:32:17,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:32:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 342. [2021-06-05 14:32:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.126099706744868) internal successors, (1066), 341 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1066 transitions. [2021-06-05 14:32:17,471 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1066 transitions. Word has length 20 [2021-06-05 14:32:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:17,471 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1066 transitions. [2021-06-05 14:32:17,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1066 transitions. [2021-06-05 14:32:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:17,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:17,471 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1563,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,672 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 154 times [2021-06-05 14:32:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280965123] [2021-06-05 14:32:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280965123] [2021-06-05 14:32:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280965123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317599688] [2021-06-05 14:32:17,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:17,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317599688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:17,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469808769] [2021-06-05 14:32:17,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:17,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:17,871 INFO L87 Difference]: Start difference. First operand 342 states and 1066 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:18,053 INFO L93 Difference]: Finished difference Result 457 states and 1334 transitions. [2021-06-05 14:32:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:18,054 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:32:18,054 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:32:18,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:32:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 345. [2021-06-05 14:32:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 14:32:18,058 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 14:32:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:18,058 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 14:32:18,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 14:32:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:18,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:18,058 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:18,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-06-05 14:32:18,259 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 155 times [2021-06-05 14:32:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:18,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095232766] [2021-06-05 14:32:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:18,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095232766] [2021-06-05 14:32:18,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095232766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023092641] [2021-06-05 14:32:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023092641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:18,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:18,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884165234] [2021-06-05 14:32:18,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:18,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:18,492 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:18,686 INFO L93 Difference]: Finished difference Result 509 states and 1476 transitions. [2021-06-05 14:32:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:18,687 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:32:18,687 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:32:18,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:32:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-06-05 14:32:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.121037463976945) internal successors, (1083), 347 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1083 transitions. [2021-06-05 14:32:18,691 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1083 transitions. Word has length 20 [2021-06-05 14:32:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:18,692 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1083 transitions. [2021-06-05 14:32:18,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1083 transitions. [2021-06-05 14:32:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:18,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:18,692 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:18,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 14:32:18,905 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 156 times [2021-06-05 14:32:18,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:18,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136062753] [2021-06-05 14:32:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136062753] [2021-06-05 14:32:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136062753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844946927] [2021-06-05 14:32:18,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:19,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844946927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:19,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:19,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145034392] [2021-06-05 14:32:19,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:19,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:19,123 INFO L87 Difference]: Start difference. First operand 348 states and 1083 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,316 INFO L93 Difference]: Finished difference Result 472 states and 1394 transitions. [2021-06-05 14:32:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,317 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:32:19,317 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:32:19,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:32:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 345. [2021-06-05 14:32:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 14:32:19,321 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 14:32:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,321 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 14:32:19,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 14:32:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:19,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,321 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:19,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-05 14:32:19,522 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:19,522 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 157 times [2021-06-05 14:32:19,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:19,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303810615] [2021-06-05 14:32:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303810615] [2021-06-05 14:32:19,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303810615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427761002] [2021-06-05 14:32:19,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427761002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:19,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:19,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996173341] [2021-06-05 14:32:19,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:19,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:19,748 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,934 INFO L93 Difference]: Finished difference Result 497 states and 1428 transitions. [2021-06-05 14:32:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,935 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:32:19,935 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:32:19,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:32:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 349. [2021-06-05 14:32:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1091954022988504) internal successors, (1082), 348 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1082 transitions. [2021-06-05 14:32:19,939 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1082 transitions. Word has length 20 [2021-06-05 14:32:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,939 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1082 transitions. [2021-06-05 14:32:19,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1082 transitions. [2021-06-05 14:32:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:19,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,939 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,140 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 158 times [2021-06-05 14:32:20,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966116129] [2021-06-05 14:32:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:20,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966116129] [2021-06-05 14:32:20,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966116129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096556556] [2021-06-05 14:32:20,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096556556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:20,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:20,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598063028] [2021-06-05 14:32:20,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:20,356 INFO L87 Difference]: Start difference. First operand 349 states and 1082 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:20,591 INFO L93 Difference]: Finished difference Result 503 states and 1449 transitions. [2021-06-05 14:32:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:20,592 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:32:20,592 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:32:20,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:32:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 346. [2021-06-05 14:32:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1072463768115943) internal successors, (1072), 345 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1072 transitions. [2021-06-05 14:32:20,596 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1072 transitions. Word has length 20 [2021-06-05 14:32:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:20,596 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1072 transitions. [2021-06-05 14:32:20,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1072 transitions. [2021-06-05 14:32:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:20,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:20,597 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,797 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 159 times [2021-06-05 14:32:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054755263] [2021-06-05 14:32:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:20,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054755263] [2021-06-05 14:32:20,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054755263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233872129] [2021-06-05 14:32:20,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233872129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:21,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929667814] [2021-06-05 14:32:21,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:21,075 INFO L87 Difference]: Start difference. First operand 346 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:21,305 INFO L93 Difference]: Finished difference Result 433 states and 1294 transitions. [2021-06-05 14:32:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:21,306 INFO L225 Difference]: With dead ends: 433 [2021-06-05 14:32:21,306 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:32:21,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:32:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2021-06-05 14:32:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1040462427745665) internal successors, (1074), 346 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1074 transitions. [2021-06-05 14:32:21,309 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1074 transitions. Word has length 20 [2021-06-05 14:32:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:21,310 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1074 transitions. [2021-06-05 14:32:21,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1074 transitions. [2021-06-05 14:32:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:21,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:21,310 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:21,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:21,511 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 160 times [2021-06-05 14:32:21,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:21,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867308305] [2021-06-05 14:32:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867308305] [2021-06-05 14:32:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867308305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000500744] [2021-06-05 14:32:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:21,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:21,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000500744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:21,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:21,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44174350] [2021-06-05 14:32:21,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:21,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:21,732 INFO L87 Difference]: Start difference. First operand 347 states and 1074 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:21,947 INFO L93 Difference]: Finished difference Result 421 states and 1261 transitions. [2021-06-05 14:32:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:21,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:21,948 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:32:21,948 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 14:32:21,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 14:32:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2021-06-05 14:32:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0955223880597016) internal successors, (1037), 335 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 14:32:21,952 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 14:32:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:21,952 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 14:32:21,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 14:32:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:21,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:21,952 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:22,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,153 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 161 times [2021-06-05 14:32:22,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:22,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552172636] [2021-06-05 14:32:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552172636] [2021-06-05 14:32:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552172636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598348748] [2021-06-05 14:32:22,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:22,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:22,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598348748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:22,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577504064] [2021-06-05 14:32:22,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:22,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:22,349 INFO L87 Difference]: Start difference. First operand 336 states and 1037 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:22,536 INFO L93 Difference]: Finished difference Result 376 states and 1139 transitions. [2021-06-05 14:32:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:22,537 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:32:22,537 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:32:22,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:32:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2021-06-05 14:32:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0873493975903616) internal successors, (1025), 332 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1025 transitions. [2021-06-05 14:32:22,541 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1025 transitions. Word has length 20 [2021-06-05 14:32:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:22,541 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1025 transitions. [2021-06-05 14:32:22,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1025 transitions. [2021-06-05 14:32:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:22,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:22,541 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:22,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-06-05 14:32:22,746 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 162 times [2021-06-05 14:32:22,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:22,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794546140] [2021-06-05 14:32:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794546140] [2021-06-05 14:32:22,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794546140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443328988] [2021-06-05 14:32:22,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:22,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443328988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:22,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128292230] [2021-06-05 14:32:22,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:22,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:22,973 INFO L87 Difference]: Start difference. First operand 333 states and 1025 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:23,151 INFO L93 Difference]: Finished difference Result 421 states and 1233 transitions. [2021-06-05 14:32:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:23,152 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:32:23,152 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 14:32:23,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 14:32:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 347. [2021-06-05 14:32:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0751445086705202) internal successors, (1064), 346 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2021-06-05 14:32:23,155 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2021-06-05 14:32:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:23,155 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2021-06-05 14:32:23,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2021-06-05 14:32:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:23,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:23,156 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-06-05 14:32:23,357 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 163 times [2021-06-05 14:32:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:23,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378672816] [2021-06-05 14:32:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:23,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378672816] [2021-06-05 14:32:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378672816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510425089] [2021-06-05 14:32:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510425089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:23,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:23,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045805158] [2021-06-05 14:32:23,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:23,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:23,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:23,595 INFO L87 Difference]: Start difference. First operand 347 states and 1064 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:23,794 INFO L93 Difference]: Finished difference Result 427 states and 1254 transitions. [2021-06-05 14:32:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:23,795 INFO L225 Difference]: With dead ends: 427 [2021-06-05 14:32:23,795 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:32:23,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:32:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 345. [2021-06-05 14:32:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.078488372093023) internal successors, (1059), 344 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2021-06-05 14:32:23,799 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2021-06-05 14:32:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:23,799 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2021-06-05 14:32:23,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2021-06-05 14:32:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:23,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:23,799 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:24,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 14:32:24,000 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 164 times [2021-06-05 14:32:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:24,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017857720] [2021-06-05 14:32:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:24,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017857720] [2021-06-05 14:32:24,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017857720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739611794] [2021-06-05 14:32:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:24,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:24,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:24,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739611794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:24,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:24,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:24,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843681334] [2021-06-05 14:32:24,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:24,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:24,227 INFO L87 Difference]: Start difference. First operand 345 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:24,396 INFO L93 Difference]: Finished difference Result 396 states and 1189 transitions. [2021-06-05 14:32:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:24,397 INFO L225 Difference]: With dead ends: 396 [2021-06-05 14:32:24,397 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 14:32:24,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 14:32:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 332. [2021-06-05 14:32:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.084592145015106) internal successors, (1021), 331 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 14:32:24,400 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 14:32:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:24,400 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 14:32:24,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 14:32:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:24,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:24,401 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:24,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 14:32:24,601 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 165 times [2021-06-05 14:32:24,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:24,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142042192] [2021-06-05 14:32:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:24,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:24,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142042192] [2021-06-05 14:32:24,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142042192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:24,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053396085] [2021-06-05 14:32:24,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:24,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053396085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:24,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:24,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746873970] [2021-06-05 14:32:24,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:24,789 INFO L87 Difference]: Start difference. First operand 332 states and 1021 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:24,928 INFO L93 Difference]: Finished difference Result 366 states and 1100 transitions. [2021-06-05 14:32:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:24,929 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:32:24,929 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:32:24,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:32:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2021-06-05 14:32:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0776119402985076) internal successors, (1031), 335 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1031 transitions. [2021-06-05 14:32:24,932 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1031 transitions. Word has length 20 [2021-06-05 14:32:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:24,933 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1031 transitions. [2021-06-05 14:32:24,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1031 transitions. [2021-06-05 14:32:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:24,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:24,933 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:25,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:25,149 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 166 times [2021-06-05 14:32:25,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:25,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308092261] [2021-06-05 14:32:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:25,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308092261] [2021-06-05 14:32:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308092261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359979792] [2021-06-05 14:32:25,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:25,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:25,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359979792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:25,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255832650] [2021-06-05 14:32:25,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:25,328 INFO L87 Difference]: Start difference. First operand 336 states and 1031 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:25,497 INFO L93 Difference]: Finished difference Result 391 states and 1152 transitions. [2021-06-05 14:32:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:25,498 INFO L225 Difference]: With dead ends: 391 [2021-06-05 14:32:25,498 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 14:32:25,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 14:32:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 346. [2021-06-05 14:32:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.066666666666667) internal successors, (1058), 345 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1058 transitions. [2021-06-05 14:32:25,502 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1058 transitions. Word has length 20 [2021-06-05 14:32:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:25,502 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1058 transitions. [2021-06-05 14:32:25,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1058 transitions. [2021-06-05 14:32:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:25,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:25,503 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:25,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 14:32:25,703 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 167 times [2021-06-05 14:32:25,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:25,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061197142] [2021-06-05 14:32:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:25,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061197142] [2021-06-05 14:32:25,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061197142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172044578] [2021-06-05 14:32:25,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:25,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:25,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172044578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435917853] [2021-06-05 14:32:25,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:25,879 INFO L87 Difference]: Start difference. First operand 346 states and 1058 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,000 INFO L93 Difference]: Finished difference Result 362 states and 1098 transitions. [2021-06-05 14:32:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,000 INFO L225 Difference]: With dead ends: 362 [2021-06-05 14:32:26,000 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 14:32:26,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 14:32:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 334. [2021-06-05 14:32:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.081081081081081) internal successors, (1026), 333 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 14:32:26,004 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 14:32:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 14:32:26,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 14:32:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:26,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,004 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:26,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:26,205 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 168 times [2021-06-05 14:32:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311331796] [2021-06-05 14:32:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311331796] [2021-06-05 14:32:26,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311331796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933899433] [2021-06-05 14:32:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:26,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933899433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:26,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:26,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043912596] [2021-06-05 14:32:26,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:26,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:26,391 INFO L87 Difference]: Start difference. First operand 334 states and 1026 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,504 INFO L93 Difference]: Finished difference Result 397 states and 1167 transitions. [2021-06-05 14:32:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,505 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:32:26,505 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:32:26,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:32:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-06-05 14:32:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.069164265129683) internal successors, (1065), 347 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1065 transitions. [2021-06-05 14:32:26,509 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1065 transitions. Word has length 20 [2021-06-05 14:32:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,509 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1065 transitions. [2021-06-05 14:32:26,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1065 transitions. [2021-06-05 14:32:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:26,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,510 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:26,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 14:32:26,710 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:26,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 169 times [2021-06-05 14:32:26,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:26,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957014580] [2021-06-05 14:32:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957014580] [2021-06-05 14:32:26,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957014580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420711735] [2021-06-05 14:32:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420711735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:26,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:26,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318404917] [2021-06-05 14:32:26,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:26,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:26,878 INFO L87 Difference]: Start difference. First operand 348 states and 1065 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,993 INFO L93 Difference]: Finished difference Result 397 states and 1173 transitions. [2021-06-05 14:32:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,993 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:32:26,993 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:32:26,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:32:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 346. [2021-06-05 14:32:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.072463768115942) internal successors, (1060), 345 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2021-06-05 14:32:26,997 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2021-06-05 14:32:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,997 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2021-06-05 14:32:26,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2021-06-05 14:32:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:26,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,998 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:27,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:27,199 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:27,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 170 times [2021-06-05 14:32:27,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:27,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813622345] [2021-06-05 14:32:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:27,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813622345] [2021-06-05 14:32:27,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813622345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914086859] [2021-06-05 14:32:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:27,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914086859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918981700] [2021-06-05 14:32:27,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:27,357 INFO L87 Difference]: Start difference. First operand 346 states and 1060 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:27,454 INFO L93 Difference]: Finished difference Result 372 states and 1123 transitions. [2021-06-05 14:32:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:27,455 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:32:27,455 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:32:27,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:32:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 334. [2021-06-05 14:32:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.081081081081081) internal successors, (1026), 333 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 14:32:27,458 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 14:32:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:27,458 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 14:32:27,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 14:32:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:27,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:27,459 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:27,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 14:32:27,659 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 171 times [2021-06-05 14:32:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44508637] [2021-06-05 14:32:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:27,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44508637] [2021-06-05 14:32:27,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44508637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335097295] [2021-06-05 14:32:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:27,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:27,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:27,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335097295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:27,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951619587] [2021-06-05 14:32:27,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:27,932 INFO L87 Difference]: Start difference. First operand 334 states and 1026 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:28,372 INFO L93 Difference]: Finished difference Result 550 states and 1636 transitions. [2021-06-05 14:32:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:28,373 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:32:28,373 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:32:28,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:32:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-06-05 14:32:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 14:32:28,377 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 14:32:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:28,377 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 14:32:28,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 14:32:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:28,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:28,378 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:28,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:28,578 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 172 times [2021-06-05 14:32:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:28,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907168661] [2021-06-05 14:32:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:28,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:28,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907168661] [2021-06-05 14:32:28,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907168661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733866338] [2021-06-05 14:32:28,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:28,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:28,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:28,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733866338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:28,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194023906] [2021-06-05 14:32:28,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:28,828 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:29,163 INFO L93 Difference]: Finished difference Result 556 states and 1643 transitions. [2021-06-05 14:32:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:29,164 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:32:29,164 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:32:29,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:32:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 14:32:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.099706744868035) internal successors, (1057), 341 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1057 transitions. [2021-06-05 14:32:29,168 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1057 transitions. Word has length 20 [2021-06-05 14:32:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:29,168 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1057 transitions. [2021-06-05 14:32:29,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1057 transitions. [2021-06-05 14:32:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:29,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:29,169 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:29,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1723 [2021-06-05 14:32:29,369 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 173 times [2021-06-05 14:32:29,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:29,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970365715] [2021-06-05 14:32:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:29,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:29,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970365715] [2021-06-05 14:32:29,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970365715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438061704] [2021-06-05 14:32:29,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:29,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:29,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:29,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438061704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:29,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:29,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903656803] [2021-06-05 14:32:29,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:29,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:29,617 INFO L87 Difference]: Start difference. First operand 342 states and 1057 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:29,896 INFO L93 Difference]: Finished difference Result 520 states and 1561 transitions. [2021-06-05 14:32:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:29,897 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:32:29,897 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:32:29,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:32:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 339. [2021-06-05 14:32:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.094674556213018) internal successors, (1046), 338 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1046 transitions. [2021-06-05 14:32:29,901 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1046 transitions. Word has length 20 [2021-06-05 14:32:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:29,901 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1046 transitions. [2021-06-05 14:32:29,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1046 transitions. [2021-06-05 14:32:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:29,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:29,901 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:30,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 14:32:30,102 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 174 times [2021-06-05 14:32:30,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:30,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310688799] [2021-06-05 14:32:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:30,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:30,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310688799] [2021-06-05 14:32:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310688799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825100373] [2021-06-05 14:32:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825100373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:30,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:30,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15696079] [2021-06-05 14:32:30,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:30,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:30,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:30,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:30,343 INFO L87 Difference]: Start difference. First operand 339 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:30,653 INFO L93 Difference]: Finished difference Result 552 states and 1621 transitions. [2021-06-05 14:32:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:30,654 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:32:30,654 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:32:30,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:32:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-06-05 14:32:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.08955223880597) internal successors, (1035), 335 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 14:32:30,658 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 14:32:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:30,658 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 14:32:30,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 14:32:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:30,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:30,658 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:30,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,859 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 175 times [2021-06-05 14:32:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:30,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364027091] [2021-06-05 14:32:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:30,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364027091] [2021-06-05 14:32:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364027091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244781379] [2021-06-05 14:32:30,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:31,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244781379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:31,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:31,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92608184] [2021-06-05 14:32:31,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:31,122 INFO L87 Difference]: Start difference. First operand 336 states and 1035 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:31,390 INFO L93 Difference]: Finished difference Result 562 states and 1666 transitions. [2021-06-05 14:32:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:31,391 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:32:31,391 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:32:31,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:32:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 343. [2021-06-05 14:32:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1052631578947367) internal successors, (1062), 342 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1062 transitions. [2021-06-05 14:32:31,395 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1062 transitions. Word has length 20 [2021-06-05 14:32:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:31,395 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1062 transitions. [2021-06-05 14:32:31,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1062 transitions. [2021-06-05 14:32:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:31,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:31,396 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:31,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-06-05 14:32:31,596 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 176 times [2021-06-05 14:32:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:31,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524083476] [2021-06-05 14:32:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:31,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:31,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524083476] [2021-06-05 14:32:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524083476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070922553] [2021-06-05 14:32:31,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:31,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:31,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070922553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:31,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:31,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402549477] [2021-06-05 14:32:31,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:31,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:31,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:31,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:31,841 INFO L87 Difference]: Start difference. First operand 343 states and 1062 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:32,119 INFO L93 Difference]: Finished difference Result 568 states and 1673 transitions. [2021-06-05 14:32:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:32,120 INFO L225 Difference]: With dead ends: 568 [2021-06-05 14:32:32,120 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:32:32,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:32:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 340. [2021-06-05 14:32:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.1002949852507373) internal successors, (1051), 339 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1051 transitions. [2021-06-05 14:32:32,124 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1051 transitions. Word has length 20 [2021-06-05 14:32:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:32,124 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1051 transitions. [2021-06-05 14:32:32,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1051 transitions. [2021-06-05 14:32:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:32,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:32,125 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:32,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:32,325 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 177 times [2021-06-05 14:32:32,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:32,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037936494] [2021-06-05 14:32:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:32,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037936494] [2021-06-05 14:32:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037936494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225540716] [2021-06-05 14:32:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:32,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:32,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225540716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:32,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:32,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:32,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561813170] [2021-06-05 14:32:32,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:32,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:32,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:32,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:32,577 INFO L87 Difference]: Start difference. First operand 340 states and 1051 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:32,827 INFO L93 Difference]: Finished difference Result 532 states and 1591 transitions. [2021-06-05 14:32:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:32,828 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:32:32,828 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:32:32,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:32:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 337. [2021-06-05 14:32:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 14:32:32,832 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 14:32:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:32,832 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 14:32:32,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 14:32:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:32,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:32,832 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:33,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-06-05 14:32:33,033 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 178 times [2021-06-05 14:32:33,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:33,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611933573] [2021-06-05 14:32:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:33,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611933573] [2021-06-05 14:32:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611933573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181349173] [2021-06-05 14:32:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:33,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181349173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:33,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:33,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490508642] [2021-06-05 14:32:33,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:33,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:33,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:33,281 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:33,716 INFO L93 Difference]: Finished difference Result 640 states and 1863 transitions. [2021-06-05 14:32:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:33,717 INFO L225 Difference]: With dead ends: 640 [2021-06-05 14:32:33,717 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:32:33,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:32:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2021-06-05 14:32:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.127906976744186) internal successors, (1076), 344 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1076 transitions. [2021-06-05 14:32:33,721 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1076 transitions. Word has length 20 [2021-06-05 14:32:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:33,721 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1076 transitions. [2021-06-05 14:32:33,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1076 transitions. [2021-06-05 14:32:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:33,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:33,722 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:33,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 14:32:33,922 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 179 times [2021-06-05 14:32:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:33,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790593918] [2021-06-05 14:32:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:33,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790593918] [2021-06-05 14:32:33,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790593918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255854015] [2021-06-05 14:32:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:34,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:34,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255854015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:34,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:34,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566768077] [2021-06-05 14:32:34,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:34,186 INFO L87 Difference]: Start difference. First operand 345 states and 1076 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:34,711 INFO L93 Difference]: Finished difference Result 646 states and 1864 transitions. [2021-06-05 14:32:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:34,712 INFO L225 Difference]: With dead ends: 646 [2021-06-05 14:32:34,712 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:32:34,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 533.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:32:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 14:32:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.106628242074928) internal successors, (1078), 347 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1078 transitions. [2021-06-05 14:32:34,717 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1078 transitions. Word has length 20 [2021-06-05 14:32:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:34,717 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1078 transitions. [2021-06-05 14:32:34,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1078 transitions. [2021-06-05 14:32:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:34,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:34,717 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:34,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:34,933 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 180 times [2021-06-05 14:32:34,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:34,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560028196] [2021-06-05 14:32:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:34,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560028196] [2021-06-05 14:32:34,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560028196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373442747] [2021-06-05 14:32:34,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:35,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:35,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:35,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:35,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373442747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670344543] [2021-06-05 14:32:35,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:35,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:35,187 INFO L87 Difference]: Start difference. First operand 348 states and 1078 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:35,439 INFO L93 Difference]: Finished difference Result 608 states and 1784 transitions. [2021-06-05 14:32:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:35,440 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:32:35,440 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 14:32:35,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 14:32:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 341. [2021-06-05 14:32:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1176470588235294) internal successors, (1060), 340 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1060 transitions. [2021-06-05 14:32:35,449 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1060 transitions. Word has length 20 [2021-06-05 14:32:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:35,449 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1060 transitions. [2021-06-05 14:32:35,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1060 transitions. [2021-06-05 14:32:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:35,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:35,450 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:35,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-05 14:32:35,650 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 181 times [2021-06-05 14:32:35,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140216174] [2021-06-05 14:32:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:35,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:35,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140216174] [2021-06-05 14:32:35,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140216174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960015818] [2021-06-05 14:32:35,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960015818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238752438] [2021-06-05 14:32:35,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:35,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:35,947 INFO L87 Difference]: Start difference. First operand 341 states and 1060 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:36,225 INFO L93 Difference]: Finished difference Result 571 states and 1702 transitions. [2021-06-05 14:32:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:36,226 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:32:36,226 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:32:36,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:32:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 338. [2021-06-05 14:32:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1008902077151337) internal successors, (1045), 337 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1045 transitions. [2021-06-05 14:32:36,230 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1045 transitions. Word has length 20 [2021-06-05 14:32:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:36,230 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1045 transitions. [2021-06-05 14:32:36,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1045 transitions. [2021-06-05 14:32:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:36,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:36,231 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:36,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,431 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 182 times [2021-06-05 14:32:36,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:36,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58420977] [2021-06-05 14:32:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:36,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:36,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58420977] [2021-06-05 14:32:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58420977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771317789] [2021-06-05 14:32:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:36,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771317789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:36,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548405463] [2021-06-05 14:32:36,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:36,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:36,683 INFO L87 Difference]: Start difference. First operand 338 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:37,194 INFO L93 Difference]: Finished difference Result 608 states and 1776 transitions. [2021-06-05 14:32:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:37,195 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:32:37,195 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 14:32:37,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 14:32:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 348. [2021-06-05 14:32:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.089337175792507) internal successors, (1072), 347 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1072 transitions. [2021-06-05 14:32:37,199 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1072 transitions. Word has length 20 [2021-06-05 14:32:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:37,199 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1072 transitions. [2021-06-05 14:32:37,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1072 transitions. [2021-06-05 14:32:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:37,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:37,200 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:37,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1817,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:37,405 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 183 times [2021-06-05 14:32:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:37,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309318992] [2021-06-05 14:32:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:37,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309318992] [2021-06-05 14:32:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309318992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147010073] [2021-06-05 14:32:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:37,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:37,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:37,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147010073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:37,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:37,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:37,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012977727] [2021-06-05 14:32:37,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:37,695 INFO L87 Difference]: Start difference. First operand 348 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:38,082 INFO L93 Difference]: Finished difference Result 585 states and 1737 transitions. [2021-06-05 14:32:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:38,083 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:32:38,083 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:32:38,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:32:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 337. [2021-06-05 14:32:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 14:32:38,087 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 14:32:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:38,087 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 14:32:38,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 14:32:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:38,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:38,087 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:38,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:38,288 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 184 times [2021-06-05 14:32:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:38,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504974968] [2021-06-05 14:32:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:38,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504974968] [2021-06-05 14:32:38,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504974968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154773692] [2021-06-05 14:32:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:38,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:38,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154773692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645156990] [2021-06-05 14:32:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:38,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:38,532 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:38,789 INFO L93 Difference]: Finished difference Result 525 states and 1574 transitions. [2021-06-05 14:32:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:38,790 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:32:38,790 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:32:38,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:32:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2021-06-05 14:32:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.091715976331361) internal successors, (1045), 338 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1045 transitions. [2021-06-05 14:32:38,793 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1045 transitions. Word has length 20 [2021-06-05 14:32:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:38,794 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1045 transitions. [2021-06-05 14:32:38,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1045 transitions. [2021-06-05 14:32:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:38,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:38,794 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:38,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:38,995 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 185 times [2021-06-05 14:32:38,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:38,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442447164] [2021-06-05 14:32:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442447164] [2021-06-05 14:32:39,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442447164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961975765] [2021-06-05 14:32:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:39,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:39,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961975765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:39,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789150384] [2021-06-05 14:32:39,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:39,273 INFO L87 Difference]: Start difference. First operand 339 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:39,685 INFO L93 Difference]: Finished difference Result 550 states and 1626 transitions. [2021-06-05 14:32:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:39,686 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:32:39,686 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:32:39,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:32:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 349. [2021-06-05 14:32:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0804597701149423) internal successors, (1072), 348 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 14:32:39,690 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 14:32:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:39,690 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 14:32:39,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 14:32:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:39,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:39,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:39,891 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 186 times [2021-06-05 14:32:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:39,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914832320] [2021-06-05 14:32:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914832320] [2021-06-05 14:32:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914832320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531722136] [2021-06-05 14:32:39,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:40,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531722136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:40,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036948541] [2021-06-05 14:32:40,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:40,159 INFO L87 Difference]: Start difference. First operand 349 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:40,435 INFO L93 Difference]: Finished difference Result 521 states and 1572 transitions. [2021-06-05 14:32:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:40,436 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:32:40,436 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:32:40,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:32:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 336. [2021-06-05 14:32:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.08955223880597) internal successors, (1035), 335 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 14:32:40,440 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 14:32:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:40,440 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 14:32:40,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 14:32:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:40,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:40,441 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:40,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:40,641 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 187 times [2021-06-05 14:32:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:40,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308730195] [2021-06-05 14:32:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:40,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308730195] [2021-06-05 14:32:40,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308730195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924662035] [2021-06-05 14:32:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924662035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:40,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932055222] [2021-06-05 14:32:40,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:40,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:40,861 INFO L87 Difference]: Start difference. First operand 336 states and 1035 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:41,125 INFO L93 Difference]: Finished difference Result 615 states and 1779 transitions. [2021-06-05 14:32:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:41,126 INFO L225 Difference]: With dead ends: 615 [2021-06-05 14:32:41,126 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 14:32:41,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 14:32:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 338. [2021-06-05 14:32:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.086053412462908) internal successors, (1040), 337 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1040 transitions. [2021-06-05 14:32:41,131 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1040 transitions. Word has length 20 [2021-06-05 14:32:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:41,131 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1040 transitions. [2021-06-05 14:32:41,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1040 transitions. [2021-06-05 14:32:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:41,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:41,131 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:41,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-05 14:32:41,332 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:41,332 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 188 times [2021-06-05 14:32:41,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:41,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754130034] [2021-06-05 14:32:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:41,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754130034] [2021-06-05 14:32:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754130034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862797399] [2021-06-05 14:32:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:41,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:41,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862797399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:41,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:41,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067711410] [2021-06-05 14:32:41,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:41,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:41,572 INFO L87 Difference]: Start difference. First operand 338 states and 1040 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:41,910 INFO L93 Difference]: Finished difference Result 576 states and 1700 transitions. [2021-06-05 14:32:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:41,911 INFO L225 Difference]: With dead ends: 576 [2021-06-05 14:32:41,911 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 14:32:41,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 14:32:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-06-05 14:32:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0825958702064895) internal successors, (1045), 339 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-06-05 14:32:41,915 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-06-05 14:32:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-06-05 14:32:41,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-06-05 14:32:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:41,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:41,916 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:42,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,121 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 189 times [2021-06-05 14:32:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:42,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813247409] [2021-06-05 14:32:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:42,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813247409] [2021-06-05 14:32:42,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813247409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965766990] [2021-06-05 14:32:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:42,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965766990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:42,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:42,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:42,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271174380] [2021-06-05 14:32:42,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:42,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:42,390 INFO L87 Difference]: Start difference. First operand 340 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:42,853 INFO L93 Difference]: Finished difference Result 601 states and 1752 transitions. [2021-06-05 14:32:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:42,854 INFO L225 Difference]: With dead ends: 601 [2021-06-05 14:32:42,854 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 14:32:42,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 14:32:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 350. [2021-06-05 14:32:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0716332378223496) internal successors, (1072), 349 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1072 transitions. [2021-06-05 14:32:42,859 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1072 transitions. Word has length 20 [2021-06-05 14:32:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:42,859 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1072 transitions. [2021-06-05 14:32:42,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1072 transitions. [2021-06-05 14:32:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:42,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:42,859 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:43,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-05 14:32:43,065 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 190 times [2021-06-05 14:32:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:43,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156845738] [2021-06-05 14:32:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156845738] [2021-06-05 14:32:43,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156845738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462587732] [2021-06-05 14:32:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462587732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:43,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:43,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325297893] [2021-06-05 14:32:43,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:43,335 INFO L87 Difference]: Start difference. First operand 350 states and 1072 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:43,624 INFO L93 Difference]: Finished difference Result 572 states and 1698 transitions. [2021-06-05 14:32:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:43,625 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:32:43,625 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:32:43,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:32:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 335. [2021-06-05 14:32:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0838323353293413) internal successors, (1030), 334 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 14:32:43,629 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 14:32:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:43,629 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 14:32:43,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 14:32:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:43,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:43,630 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:43,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1889 [2021-06-05 14:32:43,830 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 191 times [2021-06-05 14:32:43,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:43,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964213848] [2021-06-05 14:32:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964213848] [2021-06-05 14:32:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964213848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252602500] [2021-06-05 14:32:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:43,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:43,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:44,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252602500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:44,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:44,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028319223] [2021-06-05 14:32:44,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:44,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:44,097 INFO L87 Difference]: Start difference. First operand 335 states and 1030 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:44,306 INFO L93 Difference]: Finished difference Result 433 states and 1285 transitions. [2021-06-05 14:32:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:44,307 INFO L225 Difference]: With dead ends: 433 [2021-06-05 14:32:44,307 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:32:44,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:32:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 343. [2021-06-05 14:32:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1023391812865495) internal successors, (1061), 342 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 14:32:44,311 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 14:32:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:44,311 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 14:32:44,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 14:32:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:44,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:44,311 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:44,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:44,512 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 192 times [2021-06-05 14:32:44,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:44,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069003835] [2021-06-05 14:32:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:44,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:44,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069003835] [2021-06-05 14:32:44,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069003835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659232460] [2021-06-05 14:32:44,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:44,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659232460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:44,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:44,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841564816] [2021-06-05 14:32:44,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:44,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:44,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:44,793 INFO L87 Difference]: Start difference. First operand 343 states and 1061 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:45,024 INFO L93 Difference]: Finished difference Result 439 states and 1292 transitions. [2021-06-05 14:32:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:45,025 INFO L225 Difference]: With dead ends: 439 [2021-06-05 14:32:45,025 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:32:45,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:32:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 340. [2021-06-05 14:32:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 14:32:45,029 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 14:32:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:45,029 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 14:32:45,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 14:32:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:45,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:45,029 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:45,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,230 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 193 times [2021-06-05 14:32:45,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:45,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392429717] [2021-06-05 14:32:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392429717] [2021-06-05 14:32:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392429717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080191854] [2021-06-05 14:32:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080191854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:45,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:45,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024185379] [2021-06-05 14:32:45,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:45,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:45,470 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:45,704 INFO L93 Difference]: Finished difference Result 403 states and 1210 transitions. [2021-06-05 14:32:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:45,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:45,705 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:32:45,705 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:32:45,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:32:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-06-05 14:32:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0922619047619047) internal successors, (1039), 336 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 14:32:45,709 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 14:32:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:45,709 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 14:32:45,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 14:32:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:45,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:45,709 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:45,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,910 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 194 times [2021-06-05 14:32:45,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:45,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150959290] [2021-06-05 14:32:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150959290] [2021-06-05 14:32:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150959290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654477866] [2021-06-05 14:32:45,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:46,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:46,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:46,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:46,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654477866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:46,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:46,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79449308] [2021-06-05 14:32:46,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:46,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:46,146 INFO L87 Difference]: Start difference. First operand 337 states and 1039 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:46,423 INFO L93 Difference]: Finished difference Result 520 states and 1503 transitions. [2021-06-05 14:32:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:46,424 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:32:46,424 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:32:46,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:32:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 14:32:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.125) internal successors, (1075), 344 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1075 transitions. [2021-06-05 14:32:46,428 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1075 transitions. Word has length 20 [2021-06-05 14:32:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:46,428 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1075 transitions. [2021-06-05 14:32:46,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1075 transitions. [2021-06-05 14:32:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:46,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:46,429 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:46,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-06-05 14:32:46,629 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 195 times [2021-06-05 14:32:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:46,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957772677] [2021-06-05 14:32:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:46,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:46,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957772677] [2021-06-05 14:32:46,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957772677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027775178] [2021-06-05 14:32:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:46,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027775178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:46,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980760719] [2021-06-05 14:32:46,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:46,860 INFO L87 Difference]: Start difference. First operand 345 states and 1075 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:47,125 INFO L93 Difference]: Finished difference Result 526 states and 1504 transitions. [2021-06-05 14:32:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:47,126 INFO L225 Difference]: With dead ends: 526 [2021-06-05 14:32:47,126 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:32:47,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:32:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2021-06-05 14:32:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.1037463976945245) internal successors, (1077), 347 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1077 transitions. [2021-06-05 14:32:47,130 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1077 transitions. Word has length 20 [2021-06-05 14:32:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:47,130 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1077 transitions. [2021-06-05 14:32:47,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1077 transitions. [2021-06-05 14:32:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:47,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:47,131 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:47,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,331 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:47,332 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 196 times [2021-06-05 14:32:47,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:47,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060953110] [2021-06-05 14:32:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:47,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060953110] [2021-06-05 14:32:47,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060953110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370920318] [2021-06-05 14:32:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:47,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370920318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:47,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641966398] [2021-06-05 14:32:47,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:47,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:47,576 INFO L87 Difference]: Start difference. First operand 348 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:47,738 INFO L93 Difference]: Finished difference Result 488 states and 1424 transitions. [2021-06-05 14:32:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:47,739 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:32:47,739 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:32:47,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:32:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 341. [2021-06-05 14:32:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.114705882352941) internal successors, (1059), 340 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-06-05 14:32:47,743 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-06-05 14:32:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:47,743 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-06-05 14:32:47,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-06-05 14:32:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:47,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:47,744 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:47,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,944 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 197 times [2021-06-05 14:32:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450878555] [2021-06-05 14:32:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:48,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:48,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450878555] [2021-06-05 14:32:48,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450878555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126084393] [2021-06-05 14:32:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:48,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:48,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126084393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:48,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:48,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018127969] [2021-06-05 14:32:48,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:48,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:48,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:48,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:48,226 INFO L87 Difference]: Start difference. First operand 341 states and 1059 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:48,407 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-06-05 14:32:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:48,408 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:32:48,408 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:32:48,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:32:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 338. [2021-06-05 14:32:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0979228486646884) internal successors, (1044), 337 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 14:32:48,411 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 14:32:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:48,411 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 14:32:48,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 14:32:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:48,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:48,412 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:48,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1957 [2021-06-05 14:32:48,612 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 198 times [2021-06-05 14:32:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:48,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294569628] [2021-06-05 14:32:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:48,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:48,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294569628] [2021-06-05 14:32:48,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294569628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325628543] [2021-06-05 14:32:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:48,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:48,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325628543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:48,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:48,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282590044] [2021-06-05 14:32:48,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:48,880 INFO L87 Difference]: Start difference. First operand 338 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:49,197 INFO L93 Difference]: Finished difference Result 488 states and 1416 transitions. [2021-06-05 14:32:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:49,198 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:32:49,198 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:32:49,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:32:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 348. [2021-06-05 14:32:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.086455331412104) internal successors, (1071), 347 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1071 transitions. [2021-06-05 14:32:49,202 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1071 transitions. Word has length 20 [2021-06-05 14:32:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:49,202 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1071 transitions. [2021-06-05 14:32:49,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1071 transitions. [2021-06-05 14:32:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:49,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:49,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:49,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-05 14:32:49,403 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 199 times [2021-06-05 14:32:49,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:49,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004685229] [2021-06-05 14:32:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:49,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:49,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004685229] [2021-06-05 14:32:49,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004685229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:49,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061951715] [2021-06-05 14:32:49,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:49,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:49,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061951715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:49,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:49,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830240357] [2021-06-05 14:32:49,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:49,659 INFO L87 Difference]: Start difference. First operand 348 states and 1071 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:49,934 INFO L93 Difference]: Finished difference Result 465 states and 1377 transitions. [2021-06-05 14:32:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:49,934 INFO L225 Difference]: With dead ends: 465 [2021-06-05 14:32:49,934 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:32:49,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:32:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 337. [2021-06-05 14:32:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0922619047619047) internal successors, (1039), 336 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 14:32:49,938 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 14:32:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 14:32:49,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 14:32:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:49,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:49,939 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:50,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-06-05 14:32:50,139 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 200 times [2021-06-05 14:32:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:50,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646112999] [2021-06-05 14:32:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:50,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646112999] [2021-06-05 14:32:50,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646112999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736114498] [2021-06-05 14:32:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:50,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:50,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:50,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736114498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:50,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:50,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379251588] [2021-06-05 14:32:50,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:50,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:50,393 INFO L87 Difference]: Start difference. First operand 337 states and 1039 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:50,629 INFO L93 Difference]: Finished difference Result 405 states and 1214 transitions. [2021-06-05 14:32:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:50,630 INFO L225 Difference]: With dead ends: 405 [2021-06-05 14:32:50,630 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 14:32:50,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 14:32:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2021-06-05 14:32:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.088757396449704) internal successors, (1044), 338 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1044 transitions. [2021-06-05 14:32:50,634 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1044 transitions. Word has length 20 [2021-06-05 14:32:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:50,634 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1044 transitions. [2021-06-05 14:32:50,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1044 transitions. [2021-06-05 14:32:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:50,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:50,634 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:50,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:50,835 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 201 times [2021-06-05 14:32:50,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:50,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597995236] [2021-06-05 14:32:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:50,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597995236] [2021-06-05 14:32:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597995236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40830938] [2021-06-05 14:32:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:50,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40830938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:51,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268981182] [2021-06-05 14:32:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:51,115 INFO L87 Difference]: Start difference. First operand 339 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:51,380 INFO L93 Difference]: Finished difference Result 430 states and 1266 transitions. [2021-06-05 14:32:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:51,380 INFO L225 Difference]: With dead ends: 430 [2021-06-05 14:32:51,381 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:32:51,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:32:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-06-05 14:32:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0775862068965516) internal successors, (1071), 348 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2021-06-05 14:32:51,384 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2021-06-05 14:32:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:51,384 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2021-06-05 14:32:51,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2021-06-05 14:32:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:51,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:51,385 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:51,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 14:32:51,585 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 202 times [2021-06-05 14:32:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:51,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31782595] [2021-06-05 14:32:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:51,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31782595] [2021-06-05 14:32:51,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31782595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794093933] [2021-06-05 14:32:51,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:51,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794093933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:51,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318120589] [2021-06-05 14:32:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:51,827 INFO L87 Difference]: Start difference. First operand 349 states and 1071 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:52,048 INFO L93 Difference]: Finished difference Result 401 states and 1212 transitions. [2021-06-05 14:32:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:52,049 INFO L225 Difference]: With dead ends: 401 [2021-06-05 14:32:52,049 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:32:52,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:32:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 336. [2021-06-05 14:32:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0865671641791046) internal successors, (1034), 335 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 14:32:52,053 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 14:32:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:52,053 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 14:32:52,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 14:32:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:52,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:52,053 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:52,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:52,254 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 203 times [2021-06-05 14:32:52,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:52,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551685453] [2021-06-05 14:32:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:52,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551685453] [2021-06-05 14:32:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551685453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76107830] [2021-06-05 14:32:52,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:52,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76107830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:52,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591111267] [2021-06-05 14:32:52,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:52,496 INFO L87 Difference]: Start difference. First operand 336 states and 1034 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:52,683 INFO L93 Difference]: Finished difference Result 475 states and 1405 transitions. [2021-06-05 14:32:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:52,684 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:32:52,684 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:32:52,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:32:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 346. [2021-06-05 14:32:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.127536231884058) internal successors, (1079), 345 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1079 transitions. [2021-06-05 14:32:52,688 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1079 transitions. Word has length 20 [2021-06-05 14:32:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:52,688 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1079 transitions. [2021-06-05 14:32:52,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1079 transitions. [2021-06-05 14:32:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:52,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:52,689 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:52,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 14:32:52,889 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 204 times [2021-06-05 14:32:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:52,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72869266] [2021-06-05 14:32:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:52,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72869266] [2021-06-05 14:32:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72869266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493375079] [2021-06-05 14:32:52,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:53,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:53,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:53,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493375079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:53,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:53,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227884435] [2021-06-05 14:32:53,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:53,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:53,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:53,105 INFO L87 Difference]: Start difference. First operand 346 states and 1079 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:53,291 INFO L93 Difference]: Finished difference Result 481 states and 1406 transitions. [2021-06-05 14:32:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:53,292 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:32:53,292 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:32:53,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:32:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 349. [2021-06-05 14:32:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 14:32:53,296 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 14:32:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:53,297 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 14:32:53,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 14:32:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:53,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:53,297 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:53,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:53,505 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 205 times [2021-06-05 14:32:53,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:53,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207474083] [2021-06-05 14:32:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:53,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207474083] [2021-06-05 14:32:53,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207474083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143103440] [2021-06-05 14:32:53,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:53,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143103440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:53,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:53,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418303610] [2021-06-05 14:32:53,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:53,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:53,730 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:53,939 INFO L93 Difference]: Finished difference Result 533 states and 1548 transitions. [2021-06-05 14:32:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:53,940 INFO L225 Difference]: With dead ends: 533 [2021-06-05 14:32:53,940 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 14:32:53,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 14:32:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 352. [2021-06-05 14:32:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1225071225071224) internal successors, (1096), 351 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1096 transitions. [2021-06-05 14:32:53,944 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1096 transitions. Word has length 20 [2021-06-05 14:32:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:53,944 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1096 transitions. [2021-06-05 14:32:53,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1096 transitions. [2021-06-05 14:32:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:53,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:53,945 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:54,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2033,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,146 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 206 times [2021-06-05 14:32:54,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:54,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675308438] [2021-06-05 14:32:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675308438] [2021-06-05 14:32:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675308438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183614473] [2021-06-05 14:32:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183614473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:54,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:54,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383214847] [2021-06-05 14:32:54,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:54,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:54,404 INFO L87 Difference]: Start difference. First operand 352 states and 1096 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:54,586 INFO L93 Difference]: Finished difference Result 496 states and 1466 transitions. [2021-06-05 14:32:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:54,587 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:32:54,587 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:32:54,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:32:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 349. [2021-06-05 14:32:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 14:32:54,591 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 14:32:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:54,591 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 14:32:54,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 14:32:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:54,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:54,592 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:54,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,792 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:54,792 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 207 times [2021-06-05 14:32:54,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:54,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612880359] [2021-06-05 14:32:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:54,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612880359] [2021-06-05 14:32:54,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612880359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048201397] [2021-06-05 14:32:54,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:54,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048201397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:55,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:55,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379348485] [2021-06-05 14:32:55,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:55,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:55,008 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:55,229 INFO L93 Difference]: Finished difference Result 521 states and 1500 transitions. [2021-06-05 14:32:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:55,230 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:32:55,230 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:32:55,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:32:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 353. [2021-06-05 14:32:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1107954545454546) internal successors, (1095), 352 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 14:32:55,235 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 14:32:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:55,235 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 14:32:55,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 14:32:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:55,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:55,235 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:55,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,436 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 208 times [2021-06-05 14:32:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:55,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677945321] [2021-06-05 14:32:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:55,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677945321] [2021-06-05 14:32:55,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677945321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016034667] [2021-06-05 14:32:55,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:55,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:55,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016034667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:55,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276576703] [2021-06-05 14:32:55,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:55,671 INFO L87 Difference]: Start difference. First operand 353 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:55,935 INFO L93 Difference]: Finished difference Result 527 states and 1521 transitions. [2021-06-05 14:32:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:55,936 INFO L225 Difference]: With dead ends: 527 [2021-06-05 14:32:55,936 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 14:32:55,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 14:32:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 350. [2021-06-05 14:32:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.108882521489971) internal successors, (1085), 349 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1085 transitions. [2021-06-05 14:32:55,940 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1085 transitions. Word has length 20 [2021-06-05 14:32:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:55,940 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1085 transitions. [2021-06-05 14:32:55,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1085 transitions. [2021-06-05 14:32:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:55,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:55,941 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:56,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,141 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 209 times [2021-06-05 14:32:56,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:56,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958989161] [2021-06-05 14:32:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958989161] [2021-06-05 14:32:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958989161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195237634] [2021-06-05 14:32:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195237634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:56,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592890748] [2021-06-05 14:32:56,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:56,364 INFO L87 Difference]: Start difference. First operand 350 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:56,597 INFO L93 Difference]: Finished difference Result 457 states and 1366 transitions. [2021-06-05 14:32:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:56,598 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:32:56,598 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:32:56,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:32:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 351. [2021-06-05 14:32:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.105714285714286) internal successors, (1087), 350 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1087 transitions. [2021-06-05 14:32:56,602 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1087 transitions. Word has length 20 [2021-06-05 14:32:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:56,602 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1087 transitions. [2021-06-05 14:32:56,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1087 transitions. [2021-06-05 14:32:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:56,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:56,602 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:56,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,803 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 210 times [2021-06-05 14:32:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:56,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816153440] [2021-06-05 14:32:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:56,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816153440] [2021-06-05 14:32:56,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816153440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246958958] [2021-06-05 14:32:56,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246958958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258630741] [2021-06-05 14:32:57,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:57,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:57,044 INFO L87 Difference]: Start difference. First operand 351 states and 1087 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:57,317 INFO L93 Difference]: Finished difference Result 445 states and 1333 transitions. [2021-06-05 14:32:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:57,318 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:32:57,318 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:32:57,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:32:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 340. [2021-06-05 14:32:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 14:32:57,322 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 14:32:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:57,322 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 14:32:57,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 14:32:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:57,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:57,322 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:57,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2079,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:57,523 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 211 times [2021-06-05 14:32:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:57,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116853201] [2021-06-05 14:32:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116853201] [2021-06-05 14:32:57,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116853201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869121763] [2021-06-05 14:32:57,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869121763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:57,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:57,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980176631] [2021-06-05 14:32:57,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:57,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:57,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:57,774 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:58,019 INFO L93 Difference]: Finished difference Result 400 states and 1211 transitions. [2021-06-05 14:32:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:58,020 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:32:58,020 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:32:58,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:32:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 337. [2021-06-05 14:32:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0892857142857144) internal successors, (1038), 336 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1038 transitions. [2021-06-05 14:32:58,024 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1038 transitions. Word has length 20 [2021-06-05 14:32:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:58,024 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1038 transitions. [2021-06-05 14:32:58,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1038 transitions. [2021-06-05 14:32:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:58,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:58,024 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:58,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:58,225 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 212 times [2021-06-05 14:32:58,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:58,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066033710] [2021-06-05 14:32:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:58,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:58,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066033710] [2021-06-05 14:32:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066033710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:58,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074358243] [2021-06-05 14:32:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:58,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:58,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074358243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:58,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:58,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:58,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427083095] [2021-06-05 14:32:58,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:58,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:58,463 INFO L87 Difference]: Start difference. First operand 337 states and 1038 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:58,704 INFO L93 Difference]: Finished difference Result 445 states and 1305 transitions. [2021-06-05 14:32:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:58,705 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:32:58,705 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:32:58,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:32:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 351. [2021-06-05 14:32:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.077142857142857) internal successors, (1077), 350 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1077 transitions. [2021-06-05 14:32:58,709 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1077 transitions. Word has length 20 [2021-06-05 14:32:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:58,709 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1077 transitions. [2021-06-05 14:32:58,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1077 transitions. [2021-06-05 14:32:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:58,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:58,709 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:58,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:58,910 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 213 times [2021-06-05 14:32:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:58,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428513407] [2021-06-05 14:32:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:58,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428513407] [2021-06-05 14:32:58,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428513407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471501176] [2021-06-05 14:32:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471501176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:59,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:32:59,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485526480] [2021-06-05 14:32:59,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:32:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:32:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:59,149 INFO L87 Difference]: Start difference. First operand 351 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:59,400 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-06-05 14:32:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:59,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:32:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:59,401 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:32:59,401 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:32:59,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:32:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2021-06-05 14:32:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0804597701149423) internal successors, (1072), 348 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 14:32:59,405 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 14:32:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:59,405 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 14:32:59,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 14:32:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:32:59,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:59,405 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:59,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-06-05 14:32:59,606 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 214 times [2021-06-05 14:32:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413056557] [2021-06-05 14:32:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413056557] [2021-06-05 14:32:59,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413056557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961755398] [2021-06-05 14:32:59,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961755398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:59,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:59,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432168209] [2021-06-05 14:32:59,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:59,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:59,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:59,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:59,832 INFO L87 Difference]: Start difference. First operand 349 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:00,086 INFO L93 Difference]: Finished difference Result 420 states and 1261 transitions. [2021-06-05 14:33:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:00,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:00,087 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:33:00,087 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 14:33:00,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 14:33:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 336. [2021-06-05 14:33:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0865671641791046) internal successors, (1034), 335 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 14:33:00,091 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 14:33:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:00,091 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 14:33:00,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 14:33:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:00,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:00,091 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:00,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-06-05 14:33:00,292 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 215 times [2021-06-05 14:33:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:00,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963110557] [2021-06-05 14:33:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:00,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963110557] [2021-06-05 14:33:00,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963110557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078918991] [2021-06-05 14:33:00,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:00,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078918991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:00,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:00,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223660870] [2021-06-05 14:33:00,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:00,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:00,497 INFO L87 Difference]: Start difference. First operand 336 states and 1034 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:00,657 INFO L93 Difference]: Finished difference Result 394 states and 1182 transitions. [2021-06-05 14:33:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:00,658 INFO L225 Difference]: With dead ends: 394 [2021-06-05 14:33:00,658 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 14:33:00,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 14:33:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 340. [2021-06-05 14:33:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.079646017699115) internal successors, (1044), 339 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1044 transitions. [2021-06-05 14:33:00,662 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1044 transitions. Word has length 20 [2021-06-05 14:33:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:00,662 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1044 transitions. [2021-06-05 14:33:00,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1044 transitions. [2021-06-05 14:33:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:00,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:00,662 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:00,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:00,873 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 216 times [2021-06-05 14:33:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:00,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731547913] [2021-06-05 14:33:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:00,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:00,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731547913] [2021-06-05 14:33:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731547913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:00,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291206222] [2021-06-05 14:33:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:00,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:00,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:00,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291206222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890543353] [2021-06-05 14:33:01,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:01,077 INFO L87 Difference]: Start difference. First operand 340 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:01,252 INFO L93 Difference]: Finished difference Result 419 states and 1234 transitions. [2021-06-05 14:33:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:01,253 INFO L225 Difference]: With dead ends: 419 [2021-06-05 14:33:01,253 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 14:33:01,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 14:33:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 350. [2021-06-05 14:33:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0687679083094554) internal successors, (1071), 349 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1071 transitions. [2021-06-05 14:33:01,257 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1071 transitions. Word has length 20 [2021-06-05 14:33:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:01,257 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1071 transitions. [2021-06-05 14:33:01,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1071 transitions. [2021-06-05 14:33:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:01,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:01,257 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:01,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2125 [2021-06-05 14:33:01,458 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 217 times [2021-06-05 14:33:01,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:01,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5989350] [2021-06-05 14:33:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:01,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5989350] [2021-06-05 14:33:01,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5989350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502618391] [2021-06-05 14:33:01,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502618391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:01,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:01,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906674097] [2021-06-05 14:33:01,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:01,665 INFO L87 Difference]: Start difference. First operand 350 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:01,803 INFO L93 Difference]: Finished difference Result 390 states and 1180 transitions. [2021-06-05 14:33:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:01,804 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:33:01,804 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 14:33:01,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 14:33:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2021-06-05 14:33:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.083086053412463) internal successors, (1039), 337 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1039 transitions. [2021-06-05 14:33:01,808 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1039 transitions. Word has length 20 [2021-06-05 14:33:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:01,808 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1039 transitions. [2021-06-05 14:33:01,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1039 transitions. [2021-06-05 14:33:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:01,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:01,808 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:02,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:02,021 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 218 times [2021-06-05 14:33:02,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:02,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863186868] [2021-06-05 14:33:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:02,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863186868] [2021-06-05 14:33:02,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863186868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482380063] [2021-06-05 14:33:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:02,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:02,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482380063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:02,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:02,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584624181] [2021-06-05 14:33:02,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:02,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:02,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:02,225 INFO L87 Difference]: Start difference. First operand 338 states and 1039 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:02,433 INFO L93 Difference]: Finished difference Result 425 states and 1249 transitions. [2021-06-05 14:33:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:02,433 INFO L225 Difference]: With dead ends: 425 [2021-06-05 14:33:02,434 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:33:02,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:33:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 352. [2021-06-05 14:33:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0712250712250713) internal successors, (1078), 351 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1078 transitions. [2021-06-05 14:33:02,437 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1078 transitions. Word has length 20 [2021-06-05 14:33:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1078 transitions. [2021-06-05 14:33:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1078 transitions. [2021-06-05 14:33:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:02,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:02,438 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:02,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2135,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:02,649 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 219 times [2021-06-05 14:33:02,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:02,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958708491] [2021-06-05 14:33:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:02,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958708491] [2021-06-05 14:33:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958708491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187528422] [2021-06-05 14:33:02,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:02,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:02,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187528422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:02,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247186628] [2021-06-05 14:33:02,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:02,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:02,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:02,844 INFO L87 Difference]: Start difference. First operand 352 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:03,025 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2021-06-05 14:33:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:03,026 INFO L225 Difference]: With dead ends: 425 [2021-06-05 14:33:03,026 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 14:33:03,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 14:33:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2021-06-05 14:33:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0744985673352434) internal successors, (1073), 349 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1073 transitions. [2021-06-05 14:33:03,030 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1073 transitions. Word has length 20 [2021-06-05 14:33:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:03,030 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1073 transitions. [2021-06-05 14:33:03,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1073 transitions. [2021-06-05 14:33:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:03,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:03,031 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:03,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,231 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 220 times [2021-06-05 14:33:03,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:03,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505737914] [2021-06-05 14:33:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:03,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505737914] [2021-06-05 14:33:03,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505737914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70679992] [2021-06-05 14:33:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:03,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70679992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:03,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:03,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:03,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358512494] [2021-06-05 14:33:03,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:03,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:03,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:03,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:03,411 INFO L87 Difference]: Start difference. First operand 350 states and 1073 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:03,635 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 14:33:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:03,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:03,636 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:33:03,636 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:33:03,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:33:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 335. [2021-06-05 14:33:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0838323353293413) internal successors, (1030), 334 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 14:33:03,639 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 14:33:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:03,639 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 14:33:03,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 14:33:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:03,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:03,640 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:03,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,840 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 221 times [2021-06-05 14:33:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:03,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269906033] [2021-06-05 14:33:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:03,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269906033] [2021-06-05 14:33:03,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269906033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039565297] [2021-06-05 14:33:03,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:03,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039565297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:04,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:04,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127539546] [2021-06-05 14:33:04,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:04,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:04,022 INFO L87 Difference]: Start difference. First operand 335 states and 1030 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:04,191 INFO L93 Difference]: Finished difference Result 458 states and 1340 transitions. [2021-06-05 14:33:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:04,192 INFO L225 Difference]: With dead ends: 458 [2021-06-05 14:33:04,192 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 14:33:04,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 14:33:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2021-06-05 14:33:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.076923076923077) internal successors, (1040), 338 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 14:33:04,196 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 14:33:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:04,196 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 14:33:04,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 14:33:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:04,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:04,196 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:04,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-06-05 14:33:04,397 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 222 times [2021-06-05 14:33:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207500177] [2021-06-05 14:33:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207500177] [2021-06-05 14:33:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207500177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517966293] [2021-06-05 14:33:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:04,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:04,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517966293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:04,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010414291] [2021-06-05 14:33:04,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:04,599 INFO L87 Difference]: Start difference. First operand 339 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:04,750 INFO L93 Difference]: Finished difference Result 454 states and 1332 transitions. [2021-06-05 14:33:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:04,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:04,751 INFO L225 Difference]: With dead ends: 454 [2021-06-05 14:33:04,751 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 14:33:04,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 14:33:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-06-05 14:33:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.073529411764706) internal successors, (1045), 340 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 14:33:04,754 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 14:33:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:04,754 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 14:33:04,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 14:33:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:04,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:04,755 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:04,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:04,955 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:04,956 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 223 times [2021-06-05 14:33:04,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:04,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461649795] [2021-06-05 14:33:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:05,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461649795] [2021-06-05 14:33:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461649795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872973070] [2021-06-05 14:33:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872973070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:05,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712085246] [2021-06-05 14:33:05,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:05,162 INFO L87 Difference]: Start difference. First operand 341 states and 1045 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:05,439 INFO L93 Difference]: Finished difference Result 479 states and 1384 transitions. [2021-06-05 14:33:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:05,440 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:33:05,440 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 14:33:05,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 14:33:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 351. [2021-06-05 14:33:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0628571428571427) internal successors, (1072), 350 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 14:33:05,444 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 14:33:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:05,444 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 14:33:05,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 14:33:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:05,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:05,445 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:05,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 14:33:05,645 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 224 times [2021-06-05 14:33:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:05,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111657946] [2021-06-05 14:33:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:05,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111657946] [2021-06-05 14:33:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111657946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175047578] [2021-06-05 14:33:05,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:05,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:05,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:05,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:05,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175047578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:05,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:05,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553920420] [2021-06-05 14:33:05,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:05,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:05,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:05,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:05,858 INFO L87 Difference]: Start difference. First operand 351 states and 1072 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:06,013 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 14:33:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:06,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:06,014 INFO L225 Difference]: With dead ends: 450 [2021-06-05 14:33:06,014 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 14:33:06,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 14:33:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 337. [2021-06-05 14:33:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 14:33:06,017 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 14:33:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:06,017 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 14:33:06,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 14:33:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:06,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:06,018 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:06,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2164,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,218 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 225 times [2021-06-05 14:33:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:06,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20147705] [2021-06-05 14:33:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:06,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:06,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20147705] [2021-06-05 14:33:06,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20147705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876933912] [2021-06-05 14:33:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876933912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:06,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:06,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422075903] [2021-06-05 14:33:06,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:06,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:06,415 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:06,586 INFO L93 Difference]: Finished difference Result 391 states and 1173 transitions. [2021-06-05 14:33:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:06,587 INFO L225 Difference]: With dead ends: 391 [2021-06-05 14:33:06,587 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:33:06,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:33:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-06-05 14:33:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.073529411764706) internal successors, (1045), 340 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 14:33:06,594 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 14:33:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:06,594 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 14:33:06,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 14:33:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:06,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:06,594 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:06,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2168,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,809 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:06,809 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 226 times [2021-06-05 14:33:06,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:06,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527051883] [2021-06-05 14:33:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:06,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527051883] [2021-06-05 14:33:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527051883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333521417] [2021-06-05 14:33:06,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:06,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333521417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:07,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:07,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:07,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354821532] [2021-06-05 14:33:07,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:07,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:07,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:07,034 INFO L87 Difference]: Start difference. First operand 341 states and 1045 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:07,203 INFO L93 Difference]: Finished difference Result 416 states and 1225 transitions. [2021-06-05 14:33:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:07,204 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:33:07,204 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 14:33:07,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 14:33:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 351. [2021-06-05 14:33:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0628571428571427) internal successors, (1072), 350 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 14:33:07,208 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 14:33:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:07,208 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 14:33:07,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 14:33:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:07,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:07,209 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:07,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:07,425 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 227 times [2021-06-05 14:33:07,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:07,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158430845] [2021-06-05 14:33:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:07,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158430845] [2021-06-05 14:33:07,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158430845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:07,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336422157] [2021-06-05 14:33:07,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:07,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:07,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336422157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:07,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:07,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:07,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733796774] [2021-06-05 14:33:07,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:07,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:07,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:07,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:07,631 INFO L87 Difference]: Start difference. First operand 351 states and 1072 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:07,772 INFO L93 Difference]: Finished difference Result 387 states and 1171 transitions. [2021-06-05 14:33:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:07,773 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:33:07,773 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:33:07,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:33:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2021-06-05 14:33:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.076923076923077) internal successors, (1040), 338 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 14:33:07,777 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 14:33:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:07,777 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 14:33:07,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 14:33:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:07,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:07,777 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:07,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-06-05 14:33:07,993 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 228 times [2021-06-05 14:33:07,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:07,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089497482] [2021-06-05 14:33:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:08,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089497482] [2021-06-05 14:33:08,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089497482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246937338] [2021-06-05 14:33:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:08,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246937338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:08,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:08,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124191493] [2021-06-05 14:33:08,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:08,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:08,195 INFO L87 Difference]: Start difference. First operand 339 states and 1040 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:08,337 INFO L93 Difference]: Finished difference Result 420 states and 1235 transitions. [2021-06-05 14:33:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:08,338 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:33:08,338 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:33:08,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:33:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2021-06-05 14:33:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.065340909090909) internal successors, (1079), 352 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1079 transitions. [2021-06-05 14:33:08,342 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1079 transitions. Word has length 20 [2021-06-05 14:33:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:08,342 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1079 transitions. [2021-06-05 14:33:08,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1079 transitions. [2021-06-05 14:33:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:08,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:08,343 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:08,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-06-05 14:33:08,559 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 229 times [2021-06-05 14:33:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:08,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541964537] [2021-06-05 14:33:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:08,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541964537] [2021-06-05 14:33:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541964537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927738336] [2021-06-05 14:33:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927738336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:08,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:08,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680493857] [2021-06-05 14:33:08,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:08,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:08,753 INFO L87 Difference]: Start difference. First operand 353 states and 1079 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:08,940 INFO L93 Difference]: Finished difference Result 420 states and 1241 transitions. [2021-06-05 14:33:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:08,941 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:33:08,941 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 14:33:08,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:08,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 14:33:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 351. [2021-06-05 14:33:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0685714285714285) internal successors, (1074), 350 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1074 transitions. [2021-06-05 14:33:08,945 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1074 transitions. Word has length 20 [2021-06-05 14:33:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:08,945 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1074 transitions. [2021-06-05 14:33:08,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1074 transitions. [2021-06-05 14:33:08,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:08,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:08,945 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:09,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,161 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 230 times [2021-06-05 14:33:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:09,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238831224] [2021-06-05 14:33:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:09,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238831224] [2021-06-05 14:33:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238831224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713886365] [2021-06-05 14:33:09,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:09,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:09,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713886365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:33:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711555908] [2021-06-05 14:33:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:33:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:33:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:33:09,346 INFO L87 Difference]: Start difference. First operand 351 states and 1074 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:09,541 INFO L93 Difference]: Finished difference Result 395 states and 1191 transitions. [2021-06-05 14:33:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:09,542 INFO L225 Difference]: With dead ends: 395 [2021-06-05 14:33:09,542 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 14:33:09,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 14:33:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 337. [2021-06-05 14:33:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 14:33:09,546 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 14:33:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:09,547 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 14:33:09,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 14:33:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:09,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:09,547 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:09,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,757 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 915807584, now seen corresponding path program 231 times [2021-06-05 14:33:09,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:09,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950112] [2021-06-05 14:33:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:09,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950112] [2021-06-05 14:33:09,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032138570] [2021-06-05 14:33:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:09,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:09,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:09,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,931 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:33:09,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:09,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:33:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032138570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:09,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:33:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348091904] [2021-06-05 14:33:09,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:09,970 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:10,143 INFO L93 Difference]: Finished difference Result 436 states and 1297 transitions. [2021-06-05 14:33:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:10,144 INFO L225 Difference]: With dead ends: 436 [2021-06-05 14:33:10,144 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:33:10,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:33:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 332. [2021-06-05 14:33:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.066465256797583) internal successors, (1015), 331 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 14:33:10,147 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 14:33:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:10,147 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 14:33:10,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 14:33:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:10,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:10,148 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:10,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-06-05 14:33:10,364 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 232 times [2021-06-05 14:33:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:10,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411873306] [2021-06-05 14:33:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:10,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411873306] [2021-06-05 14:33:10,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411873306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318023979] [2021-06-05 14:33:10,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:10,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:10,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:10,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:10,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:10,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,552 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:33:10,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:10,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 14:33:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:10,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318023979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:10,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:10,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046917610] [2021-06-05 14:33:10,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:10,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:10,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:10,563 INFO L87 Difference]: Start difference. First operand 332 states and 1015 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:10,664 INFO L93 Difference]: Finished difference Result 419 states and 1237 transitions. [2021-06-05 14:33:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:10,665 INFO L225 Difference]: With dead ends: 419 [2021-06-05 14:33:10,665 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:33:10,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:33:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-06-05 14:33:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0527859237536656) internal successors, (1041), 341 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1041 transitions. [2021-06-05 14:33:10,668 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1041 transitions. Word has length 20 [2021-06-05 14:33:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:10,668 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1041 transitions. [2021-06-05 14:33:10,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1041 transitions. [2021-06-05 14:33:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:10,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:10,669 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:10,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-06-05 14:33:10,869 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 233 times [2021-06-05 14:33:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:10,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238775602] [2021-06-05 14:33:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:10,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:10,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238775602] [2021-06-05 14:33:10,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238775602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300068223] [2021-06-05 14:33:10,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:10,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:10,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:11,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:11,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,033 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:33:11,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:11,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 14:33:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300068223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:11,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:33:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512442179] [2021-06-05 14:33:11,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:33:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:33:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:33:11,062 INFO L87 Difference]: Start difference. First operand 342 states and 1041 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:11,189 INFO L93 Difference]: Finished difference Result 471 states and 1358 transitions. [2021-06-05 14:33:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:11,190 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:33:11,190 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:33:11,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:33:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 345. [2021-06-05 14:33:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.058139534883721) internal successors, (1052), 344 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1052 transitions. [2021-06-05 14:33:11,194 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1052 transitions. Word has length 20 [2021-06-05 14:33:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:11,194 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1052 transitions. [2021-06-05 14:33:11,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1052 transitions. [2021-06-05 14:33:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:11,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:11,194 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:11,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2211 [2021-06-05 14:33:11,410 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 234 times [2021-06-05 14:33:11,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:11,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323331154] [2021-06-05 14:33:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323331154] [2021-06-05 14:33:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323331154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618848788] [2021-06-05 14:33:11,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:11,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:11,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,587 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 14:33:11,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:11,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 14:33:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618848788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:11,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:33:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715655903] [2021-06-05 14:33:11,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:33:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:33:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:33:11,606 INFO L87 Difference]: Start difference. First operand 345 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:11,729 INFO L93 Difference]: Finished difference Result 428 states and 1255 transitions. [2021-06-05 14:33:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:11,730 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:33:11,730 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 14:33:11,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 14:33:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 337. [2021-06-05 14:33:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0595238095238093) internal successors, (1028), 336 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1028 transitions. [2021-06-05 14:33:11,733 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1028 transitions. Word has length 20 [2021-06-05 14:33:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1028 transitions. [2021-06-05 14:33:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1028 transitions. [2021-06-05 14:33:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:11,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:11,734 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:11,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:11,941 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 235 times [2021-06-05 14:33:11,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:11,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852609654] [2021-06-05 14:33:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:11,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852609654] [2021-06-05 14:33:11,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852609654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436965137] [2021-06-05 14:33:11,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436965137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182614975] [2021-06-05 14:33:12,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:12,136 INFO L87 Difference]: Start difference. First operand 337 states and 1028 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:12,269 INFO L93 Difference]: Finished difference Result 397 states and 1171 transitions. [2021-06-05 14:33:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:12,270 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:33:12,270 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:33:12,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:33:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2021-06-05 14:33:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0701754385964914) internal successors, (1050), 342 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1050 transitions. [2021-06-05 14:33:12,273 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1050 transitions. Word has length 20 [2021-06-05 14:33:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:12,273 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1050 transitions. [2021-06-05 14:33:12,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1050 transitions. [2021-06-05 14:33:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:12,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:12,274 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:12,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:12,474 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 236 times [2021-06-05 14:33:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:12,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80620462] [2021-06-05 14:33:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:12,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:12,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80620462] [2021-06-05 14:33:12,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80620462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422582119] [2021-06-05 14:33:12,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:12,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422582119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:12,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245768260] [2021-06-05 14:33:12,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:12,671 INFO L87 Difference]: Start difference. First operand 343 states and 1050 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:12,878 INFO L93 Difference]: Finished difference Result 403 states and 1178 transitions. [2021-06-05 14:33:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:12,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:12,878 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:33:12,878 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:33:12,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:33:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-06-05 14:33:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0648967551622417) internal successors, (1039), 339 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2021-06-05 14:33:12,882 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2021-06-05 14:33:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:12,882 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2021-06-05 14:33:12,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2021-06-05 14:33:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:12,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:12,883 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:13,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-06-05 14:33:13,083 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 237 times [2021-06-05 14:33:13,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:13,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025870298] [2021-06-05 14:33:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:13,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:13,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025870298] [2021-06-05 14:33:13,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025870298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:13,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750186176] [2021-06-05 14:33:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:13,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750186176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:13,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:33:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640101870] [2021-06-05 14:33:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:33:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:33:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:33:13,276 INFO L87 Difference]: Start difference. First operand 340 states and 1039 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:13,449 INFO L93 Difference]: Finished difference Result 361 states and 1083 transitions. [2021-06-05 14:33:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:13,450 INFO L225 Difference]: With dead ends: 361 [2021-06-05 14:33:13,450 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 14:33:13,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 14:33:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 332. [2021-06-05 14:33:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.066465256797583) internal successors, (1015), 331 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 14:33:13,453 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 14:33:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:13,453 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 14:33:13,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 14:33:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:13,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:13,454 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:13,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-05 14:33:13,655 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash -144970506, now seen corresponding path program 238 times [2021-06-05 14:33:13,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:13,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806030764] [2021-06-05 14:33:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:13,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806030764] [2021-06-05 14:33:13,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806030764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71207230] [2021-06-05 14:33:13,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:13,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:13,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:13,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:13,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:13,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:13,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:13,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:13,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:13,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:13,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:13,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:13,823 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:33:13,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:13,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 14:33:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:13,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71207230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:13,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:13,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:33:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226474967] [2021-06-05 14:33:13,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:13,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:13,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:13,876 INFO L87 Difference]: Start difference. First operand 332 states and 1015 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:14,108 INFO L93 Difference]: Finished difference Result 522 states and 1535 transitions. [2021-06-05 14:33:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:14,109 INFO L225 Difference]: With dead ends: 522 [2021-06-05 14:33:14,109 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 14:33:14,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 14:33:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 337. [2021-06-05 14:33:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0952380952380953) internal successors, (1040), 336 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 14:33:14,113 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 14:33:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:14,113 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 14:33:14,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 14:33:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:14,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:14,113 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:14,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-06-05 14:33:14,314 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 239 times [2021-06-05 14:33:14,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:14,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966326543] [2021-06-05 14:33:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:14,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966326543] [2021-06-05 14:33:14,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966326543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384602625] [2021-06-05 14:33:14,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:14,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:14,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:14,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:14,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,569 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-06-05 14:33:14,569 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-06-05 14:33:14,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:14,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,592 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 14:33:14,592 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:14,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:14,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-06-05 14:33:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384602625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:14,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:14,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195608254] [2021-06-05 14:33:14,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:14,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:14,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:14,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:14,630 INFO L87 Difference]: Start difference. First operand 337 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:14,833 INFO L93 Difference]: Finished difference Result 577 states and 1670 transitions. [2021-06-05 14:33:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:14,834 INFO L225 Difference]: With dead ends: 577 [2021-06-05 14:33:14,834 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 14:33:14,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 14:33:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 349. [2021-06-05 14:33:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1063218390804597) internal successors, (1081), 348 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 14:33:14,845 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 14:33:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:14,845 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 14:33:14,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 14:33:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:14,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:14,845 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:15,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-06-05 14:33:15,046 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 240 times [2021-06-05 14:33:15,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:15,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556407280] [2021-06-05 14:33:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:15,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556407280] [2021-06-05 14:33:15,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556407280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770605954] [2021-06-05 14:33:15,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:15,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,250 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 14:33:15,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:15,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:15,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,274 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:15,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:15,275 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 14:33:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770605954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:15,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:15,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559732142] [2021-06-05 14:33:15,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:15,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:15,316 INFO L87 Difference]: Start difference. First operand 349 states and 1081 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:15,456 INFO L93 Difference]: Finished difference Result 629 states and 1791 transitions. [2021-06-05 14:33:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:15,457 INFO L225 Difference]: With dead ends: 629 [2021-06-05 14:33:15,457 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 14:33:15,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 14:33:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 355. [2021-06-05 14:33:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1242937853107344) internal successors, (1106), 354 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-06-05 14:33:15,462 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-06-05 14:33:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:15,462 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-06-05 14:33:15,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-06-05 14:33:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:15,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:15,462 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:15,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,673 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 241 times [2021-06-05 14:33:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926663645] [2021-06-05 14:33:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:15,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926663645] [2021-06-05 14:33:15,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926663645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380948781] [2021-06-05 14:33:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:15,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:15,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:15,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:15,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,900 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:15,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:15,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380948781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711064406] [2021-06-05 14:33:15,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:15,940 INFO L87 Difference]: Start difference. First operand 355 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:16,124 INFO L93 Difference]: Finished difference Result 586 states and 1682 transitions. [2021-06-05 14:33:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:16,124 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:33:16,125 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 14:33:16,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 14:33:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 353. [2021-06-05 14:33:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1107954545454546) internal successors, (1095), 352 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 14:33:16,129 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 14:33:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:16,129 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 14:33:16,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 14:33:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:16,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:16,157 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:16,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,373 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 242 times [2021-06-05 14:33:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:16,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459764791] [2021-06-05 14:33:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:16,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:16,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459764791] [2021-06-05 14:33:16,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459764791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100970768] [2021-06-05 14:33:16,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:16,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:16,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:16,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:16,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,550 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-06-05 14:33:16,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:16,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:16,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:16,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:33:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100970768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:16,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:33:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138218464] [2021-06-05 14:33:16,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:16,609 INFO L87 Difference]: Start difference. First operand 353 states and 1095 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:16,861 INFO L93 Difference]: Finished difference Result 469 states and 1402 transitions. [2021-06-05 14:33:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:16,862 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:33:16,862 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 14:33:16,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 14:33:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-06-05 14:33:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0809248554913293) internal successors, (1066), 346 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2021-06-05 14:33:16,886 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2021-06-05 14:33:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:16,886 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2021-06-05 14:33:16,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2021-06-05 14:33:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:16,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:16,887 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:17,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 14:33:17,103 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 243 times [2021-06-05 14:33:17,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:17,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235585711] [2021-06-05 14:33:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:17,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:17,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235585711] [2021-06-05 14:33:17,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235585711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275724072] [2021-06-05 14:33:17,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:17,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:17,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,322 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 14:33:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:17,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:17,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,350 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:17,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:17,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 14:33:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:17,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275724072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:17,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:33:17,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292059977] [2021-06-05 14:33:17,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:17,398 INFO L87 Difference]: Start difference. First operand 347 states and 1066 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:17,576 INFO L93 Difference]: Finished difference Result 530 states and 1548 transitions. [2021-06-05 14:33:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:17,577 INFO L225 Difference]: With dead ends: 530 [2021-06-05 14:33:17,577 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:33:17,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:33:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 337. [2021-06-05 14:33:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.080357142857143) internal successors, (1035), 336 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 14:33:17,581 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 14:33:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:17,581 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 14:33:17,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 14:33:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:17,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:17,582 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:17,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2311,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:17,798 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 244 times [2021-06-05 14:33:17,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345603695] [2021-06-05 14:33:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:17,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345603695] [2021-06-05 14:33:17,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345603695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473175609] [2021-06-05 14:33:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:17,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:17,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:17,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:17,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:17,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,027 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 14:33:18,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:18,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:18,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,049 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:18,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:18,050 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 14:33:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473175609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:18,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:18,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43587157] [2021-06-05 14:33:18,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:18,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:18,094 INFO L87 Difference]: Start difference. First operand 337 states and 1035 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:18,222 INFO L93 Difference]: Finished difference Result 497 states and 1466 transitions. [2021-06-05 14:33:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:18,223 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:33:18,223 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:33:18,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:33:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 340. [2021-06-05 14:33:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0973451327433628) internal successors, (1050), 339 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 14:33:18,227 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 14:33:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:18,227 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 14:33:18,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 14:33:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:18,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:18,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:18,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-06-05 14:33:18,428 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 245 times [2021-06-05 14:33:18,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:18,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48920091] [2021-06-05 14:33:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:18,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48920091] [2021-06-05 14:33:18,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48920091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080114739] [2021-06-05 14:33:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:18,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:18,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:18,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:18,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:18,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,656 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:18,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:18,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080114739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:18,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:18,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650833522] [2021-06-05 14:33:18,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:18,698 INFO L87 Difference]: Start difference. First operand 340 states and 1050 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:18,791 INFO L93 Difference]: Finished difference Result 464 states and 1389 transitions. [2021-06-05 14:33:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:18,792 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:33:18,792 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 14:33:18,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 14:33:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 331. [2021-06-05 14:33:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0636363636363635) internal successors, (1011), 330 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1011 transitions. [2021-06-05 14:33:18,796 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1011 transitions. Word has length 20 [2021-06-05 14:33:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:18,796 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1011 transitions. [2021-06-05 14:33:18,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1011 transitions. [2021-06-05 14:33:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:18,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:18,796 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:18,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2333 [2021-06-05 14:33:18,997 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 246 times [2021-06-05 14:33:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:18,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128735623] [2021-06-05 14:33:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:19,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128735623] [2021-06-05 14:33:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128735623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910831450] [2021-06-05 14:33:19,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:19,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:19,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:19,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:19,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:19,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:19,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:19,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,227 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:19,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:19,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:19,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910831450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:19,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:19,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211996806] [2021-06-05 14:33:19,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:19,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:19,296 INFO L87 Difference]: Start difference. First operand 331 states and 1011 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:19,464 INFO L93 Difference]: Finished difference Result 574 states and 1673 transitions. [2021-06-05 14:33:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:19,465 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:33:19,465 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:33:19,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:33:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 339. [2021-06-05 14:33:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0976331360946747) internal successors, (1047), 338 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1047 transitions. [2021-06-05 14:33:19,470 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1047 transitions. Word has length 20 [2021-06-05 14:33:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:19,470 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1047 transitions. [2021-06-05 14:33:19,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1047 transitions. [2021-06-05 14:33:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:19,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:19,470 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:19,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-06-05 14:33:19,671 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 247 times [2021-06-05 14:33:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:19,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008139328] [2021-06-05 14:33:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:19,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:19,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008139328] [2021-06-05 14:33:19,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008139328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248057820] [2021-06-05 14:33:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:19,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,899 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 14:33:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:19,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:19,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,920 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:19,920 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:19,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:19,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 14:33:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:19,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248057820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:19,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116065221] [2021-06-05 14:33:19,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:19,988 INFO L87 Difference]: Start difference. First operand 339 states and 1047 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:20,152 INFO L93 Difference]: Finished difference Result 560 states and 1622 transitions. [2021-06-05 14:33:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:20,153 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:33:20,153 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:33:20,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:33:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-06-05 14:33:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0762463343108504) internal successors, (1049), 341 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1049 transitions. [2021-06-05 14:33:20,157 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1049 transitions. Word has length 20 [2021-06-05 14:33:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:20,157 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1049 transitions. [2021-06-05 14:33:20,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1049 transitions. [2021-06-05 14:33:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:20,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:20,158 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:20,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-06-05 14:33:20,365 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 248 times [2021-06-05 14:33:20,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:20,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111426946] [2021-06-05 14:33:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:20,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:20,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111426946] [2021-06-05 14:33:20,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111426946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:20,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763121386] [2021-06-05 14:33:20,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:20,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:20,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:20,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,575 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 14:33:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:20,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:20,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,602 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:20,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:20,603 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 14:33:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763121386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:20,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:20,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:20,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535704576] [2021-06-05 14:33:20,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:20,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:20,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:20,677 INFO L87 Difference]: Start difference. First operand 342 states and 1049 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:20,871 INFO L93 Difference]: Finished difference Result 570 states and 1656 transitions. [2021-06-05 14:33:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:20,872 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:33:20,872 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:33:20,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:33:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 335. [2021-06-05 14:33:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 14:33:20,876 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 14:33:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:20,876 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 14:33:20,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 14:33:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:20,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:20,877 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,077 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 249 times [2021-06-05 14:33:21,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:21,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091555531] [2021-06-05 14:33:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091555531] [2021-06-05 14:33:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091555531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693981722] [2021-06-05 14:33:21,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:21,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:21,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:21,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:21,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,294 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:21,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:21,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693981722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:21,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:21,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744094286] [2021-06-05 14:33:21,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:21,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:21,364 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:21,524 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-06-05 14:33:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:21,525 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:33:21,525 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:33:21,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:33:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 14:33:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.069486404833837) internal successors, (1016), 331 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1016 transitions. [2021-06-05 14:33:21,529 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1016 transitions. Word has length 20 [2021-06-05 14:33:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:21,529 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1016 transitions. [2021-06-05 14:33:21,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1016 transitions. [2021-06-05 14:33:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:21,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:21,530 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:21,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,730 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:21,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:21,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 250 times [2021-06-05 14:33:21,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:21,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902368108] [2021-06-05 14:33:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:21,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902368108] [2021-06-05 14:33:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902368108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258424089] [2021-06-05 14:33:21,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:21,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:21,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:21,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:21,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:21,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:21,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,940 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:21,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:21,940 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258424089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:22,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:22,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:22,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137501363] [2021-06-05 14:33:22,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:22,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:22,016 INFO L87 Difference]: Start difference. First operand 332 states and 1016 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:22,202 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 14:33:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:22,202 INFO L225 Difference]: With dead ends: 505 [2021-06-05 14:33:22,203 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 14:33:22,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 14:33:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 342. [2021-06-05 14:33:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.058651026392962) internal successors, (1043), 341 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1043 transitions. [2021-06-05 14:33:22,206 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1043 transitions. Word has length 20 [2021-06-05 14:33:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:22,206 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1043 transitions. [2021-06-05 14:33:22,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1043 transitions. [2021-06-05 14:33:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:22,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:22,207 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:22,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-06-05 14:33:22,407 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:22,408 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 251 times [2021-06-05 14:33:22,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:22,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357443512] [2021-06-05 14:33:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:22,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357443512] [2021-06-05 14:33:22,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357443512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885446749] [2021-06-05 14:33:22,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:22,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:22,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:22,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:22,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:22,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,623 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:22,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:22,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:22,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885446749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:22,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:22,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:22,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616913392] [2021-06-05 14:33:22,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:22,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:22,697 INFO L87 Difference]: Start difference. First operand 342 states and 1043 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:22,844 INFO L93 Difference]: Finished difference Result 482 states and 1437 transitions. [2021-06-05 14:33:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:22,845 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:33:22,845 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:33:22,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:33:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 329. [2021-06-05 14:33:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.057926829268293) internal successors, (1003), 328 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1003 transitions. [2021-06-05 14:33:22,848 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1003 transitions. Word has length 20 [2021-06-05 14:33:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:22,848 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1003 transitions. [2021-06-05 14:33:22,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1003 transitions. [2021-06-05 14:33:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:22,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:22,849 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:23,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,049 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:23,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 252 times [2021-06-05 14:33:23,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:23,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569209046] [2021-06-05 14:33:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569209046] [2021-06-05 14:33:23,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569209046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841234956] [2021-06-05 14:33:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:23,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:23,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841234956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:23,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:23,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835589084] [2021-06-05 14:33:23,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:23,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:23,300 INFO L87 Difference]: Start difference. First operand 329 states and 1003 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:23,567 INFO L93 Difference]: Finished difference Result 403 states and 1191 transitions. [2021-06-05 14:33:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:23,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:23,568 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:33:23,568 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:33:23,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:33:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 336. [2021-06-05 14:33:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.074626865671642) internal successors, (1030), 335 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1030 transitions. [2021-06-05 14:33:23,572 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1030 transitions. Word has length 20 [2021-06-05 14:33:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:23,572 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1030 transitions. [2021-06-05 14:33:23,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1030 transitions. [2021-06-05 14:33:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:23,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:23,572 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:23,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 14:33:23,776 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 253 times [2021-06-05 14:33:23,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:23,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105767052] [2021-06-05 14:33:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:23,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105767052] [2021-06-05 14:33:23,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105767052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556850637] [2021-06-05 14:33:23,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:24,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556850637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:24,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:24,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923527572] [2021-06-05 14:33:24,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:24,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:24,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:24,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:24,032 INFO L87 Difference]: Start difference. First operand 336 states and 1030 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:24,308 INFO L93 Difference]: Finished difference Result 409 states and 1198 transitions. [2021-06-05 14:33:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:24,309 INFO L225 Difference]: With dead ends: 409 [2021-06-05 14:33:24,309 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:33:24,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:33:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-06-05 14:33:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.069277108433735) internal successors, (1019), 332 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1019 transitions. [2021-06-05 14:33:24,312 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1019 transitions. Word has length 20 [2021-06-05 14:33:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:24,313 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1019 transitions. [2021-06-05 14:33:24,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1019 transitions. [2021-06-05 14:33:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:24,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:24,313 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:24,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:24,517 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 254 times [2021-06-05 14:33:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:24,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475682220] [2021-06-05 14:33:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:24,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:24,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475682220] [2021-06-05 14:33:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475682220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860558926] [2021-06-05 14:33:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:24,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860558926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:24,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:24,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978962854] [2021-06-05 14:33:24,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:24,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:24,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:24,757 INFO L87 Difference]: Start difference. First operand 333 states and 1019 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:25,079 INFO L93 Difference]: Finished difference Result 373 states and 1116 transitions. [2021-06-05 14:33:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:25,080 INFO L225 Difference]: With dead ends: 373 [2021-06-05 14:33:25,080 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 14:33:25,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 14:33:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 330. [2021-06-05 14:33:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0638297872340425) internal successors, (1008), 329 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 14:33:25,083 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 14:33:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:25,083 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 14:33:25,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 14:33:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:25,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:25,084 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:25,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,285 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 255 times [2021-06-05 14:33:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:25,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8452794] [2021-06-05 14:33:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8452794] [2021-06-05 14:33:25,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8452794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590169293] [2021-06-05 14:33:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590169293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:25,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:25,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387755637] [2021-06-05 14:33:25,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:25,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:25,530 INFO L87 Difference]: Start difference. First operand 330 states and 1008 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:25,724 INFO L93 Difference]: Finished difference Result 487 states and 1401 transitions. [2021-06-05 14:33:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:25,725 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:33:25,725 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:33:25,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:33:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 338. [2021-06-05 14:33:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0979228486646884) internal successors, (1044), 337 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 14:33:25,729 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 14:33:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:25,729 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 14:33:25,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 14:33:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:25,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:25,729 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:25,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,933 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 256 times [2021-06-05 14:33:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:25,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781873132] [2021-06-05 14:33:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781873132] [2021-06-05 14:33:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781873132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102000947] [2021-06-05 14:33:25,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:26,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:26,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102000947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:26,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057976663] [2021-06-05 14:33:26,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:26,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:26,166 INFO L87 Difference]: Start difference. First operand 338 states and 1044 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:26,337 INFO L93 Difference]: Finished difference Result 493 states and 1402 transitions. [2021-06-05 14:33:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:26,338 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:33:26,338 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:33:26,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:33:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 341. [2021-06-05 14:33:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0764705882352943) internal successors, (1046), 340 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 14:33:26,342 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 14:33:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:26,342 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 14:33:26,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 14:33:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:26,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:26,342 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:26,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:26,543 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:26,543 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 257 times [2021-06-05 14:33:26,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:26,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961327874] [2021-06-05 14:33:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:26,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961327874] [2021-06-05 14:33:26,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961327874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183098222] [2021-06-05 14:33:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:26,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183098222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:26,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333460904] [2021-06-05 14:33:26,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:26,788 INFO L87 Difference]: Start difference. First operand 341 states and 1046 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:26,976 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2021-06-05 14:33:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:26,976 INFO L225 Difference]: With dead ends: 455 [2021-06-05 14:33:26,976 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:33:26,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:33:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 334. [2021-06-05 14:33:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.0870870870870872) internal successors, (1028), 333 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1028 transitions. [2021-06-05 14:33:26,980 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1028 transitions. Word has length 20 [2021-06-05 14:33:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:26,980 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1028 transitions. [2021-06-05 14:33:26,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1028 transitions. [2021-06-05 14:33:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:26,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:26,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:27,181 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 258 times [2021-06-05 14:33:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:27,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049534980] [2021-06-05 14:33:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049534980] [2021-06-05 14:33:27,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049534980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832663052] [2021-06-05 14:33:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:27,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832663052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:27,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000599540] [2021-06-05 14:33:27,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:27,441 INFO L87 Difference]: Start difference. First operand 334 states and 1028 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:27,608 INFO L93 Difference]: Finished difference Result 418 states and 1240 transitions. [2021-06-05 14:33:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:27,609 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:33:27,609 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:33:27,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:33:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 331. [2021-06-05 14:33:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.06969696969697) internal successors, (1013), 330 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1013 transitions. [2021-06-05 14:33:27,612 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1013 transitions. Word has length 20 [2021-06-05 14:33:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:27,612 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1013 transitions. [2021-06-05 14:33:27,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1013 transitions. [2021-06-05 14:33:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:27,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:27,613 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:27,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 14:33:27,813 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 259 times [2021-06-05 14:33:27,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:27,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102145607] [2021-06-05 14:33:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102145607] [2021-06-05 14:33:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102145607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690966923] [2021-06-05 14:33:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:28,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690966923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:28,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952111722] [2021-06-05 14:33:28,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:28,048 INFO L87 Difference]: Start difference. First operand 331 states and 1013 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:28,242 INFO L93 Difference]: Finished difference Result 455 states and 1314 transitions. [2021-06-05 14:33:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:28,243 INFO L225 Difference]: With dead ends: 455 [2021-06-05 14:33:28,243 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 14:33:28,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 14:33:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 341. [2021-06-05 14:33:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0588235294117645) internal successors, (1040), 340 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1040 transitions. [2021-06-05 14:33:28,247 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1040 transitions. Word has length 20 [2021-06-05 14:33:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:28,247 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1040 transitions. [2021-06-05 14:33:28,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1040 transitions. [2021-06-05 14:33:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:28,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:28,248 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:28,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:28,448 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 260 times [2021-06-05 14:33:28,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:28,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052084591] [2021-06-05 14:33:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:28,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052084591] [2021-06-05 14:33:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052084591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929128876] [2021-06-05 14:33:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:28,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929128876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:28,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:28,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115496183] [2021-06-05 14:33:28,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:28,685 INFO L87 Difference]: Start difference. First operand 341 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:28,906 INFO L93 Difference]: Finished difference Result 432 states and 1275 transitions. [2021-06-05 14:33:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:28,907 INFO L225 Difference]: With dead ends: 432 [2021-06-05 14:33:28,907 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 14:33:28,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 14:33:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2021-06-05 14:33:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0638297872340425) internal successors, (1008), 329 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 14:33:28,910 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 14:33:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:28,910 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 14:33:28,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 14:33:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:28,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:28,911 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:29,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,111 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 261 times [2021-06-05 14:33:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:29,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592847699] [2021-06-05 14:33:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:29,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592847699] [2021-06-05 14:33:29,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592847699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334790894] [2021-06-05 14:33:29,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:29,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334790894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:29,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:29,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406779343] [2021-06-05 14:33:29,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:29,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:29,344 INFO L87 Difference]: Start difference. First operand 330 states and 1008 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:29,635 INFO L93 Difference]: Finished difference Result 364 states and 1092 transitions. [2021-06-05 14:33:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:29,636 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:33:29,636 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 14:33:29,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 14:33:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2021-06-05 14:33:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0604229607250755) internal successors, (1013), 331 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1013 transitions. [2021-06-05 14:33:29,640 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1013 transitions. Word has length 20 [2021-06-05 14:33:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:29,640 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1013 transitions. [2021-06-05 14:33:29,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1013 transitions. [2021-06-05 14:33:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:29,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:29,640 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:29,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-06-05 14:33:29,840 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:29,841 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 262 times [2021-06-05 14:33:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:29,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573039876] [2021-06-05 14:33:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:29,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573039876] [2021-06-05 14:33:29,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573039876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918099208] [2021-06-05 14:33:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:29,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918099208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497332660] [2021-06-05 14:33:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:30,088 INFO L87 Difference]: Start difference. First operand 332 states and 1013 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:30,403 INFO L93 Difference]: Finished difference Result 389 states and 1144 transitions. [2021-06-05 14:33:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:30,403 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:33:30,403 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 14:33:30,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 14:33:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2021-06-05 14:33:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0498533724340176) internal successors, (1040), 341 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1040 transitions. [2021-06-05 14:33:30,407 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1040 transitions. Word has length 20 [2021-06-05 14:33:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:30,407 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1040 transitions. [2021-06-05 14:33:30,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1040 transitions. [2021-06-05 14:33:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:30,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:30,407 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:30,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:30,608 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 263 times [2021-06-05 14:33:30,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:30,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462154814] [2021-06-05 14:33:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462154814] [2021-06-05 14:33:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462154814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465488576] [2021-06-05 14:33:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:30,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:30,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:30,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465488576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:30,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:30,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265315726] [2021-06-05 14:33:30,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:30,841 INFO L87 Difference]: Start difference. First operand 342 states and 1040 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:31,074 INFO L93 Difference]: Finished difference Result 360 states and 1090 transitions. [2021-06-05 14:33:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:31,075 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:33:31,075 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:33:31,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:33:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2021-06-05 14:33:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0521472392638036) internal successors, (995), 326 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 995 transitions. [2021-06-05 14:33:31,078 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 995 transitions. Word has length 20 [2021-06-05 14:33:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:31,078 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 995 transitions. [2021-06-05 14:33:31,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 995 transitions. [2021-06-05 14:33:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:31,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:31,078 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:31,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-06-05 14:33:31,279 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 264 times [2021-06-05 14:33:31,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:31,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540511943] [2021-06-05 14:33:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:31,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540511943] [2021-06-05 14:33:31,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540511943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458992987] [2021-06-05 14:33:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:31,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:31,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:31,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:31,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:31,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:31,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:31,508 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-06-05 14:33:31,509 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-05 14:33:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:31,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:31,531 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 14:33:31,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:31,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-06-05 14:33:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:31,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458992987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:31,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:33:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932936612] [2021-06-05 14:33:31,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:31,588 INFO L87 Difference]: Start difference. First operand 327 states and 995 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:31,860 INFO L93 Difference]: Finished difference Result 462 states and 1326 transitions. [2021-06-05 14:33:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:31,861 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:33:31,861 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 14:33:31,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 14:33:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 322. [2021-06-05 14:33:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.0218068535825546) internal successors, (970), 321 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 970 transitions. [2021-06-05 14:33:31,865 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 970 transitions. Word has length 20 [2021-06-05 14:33:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:31,865 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 970 transitions. [2021-06-05 14:33:31,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 970 transitions. [2021-06-05 14:33:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:31,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:31,865 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:32,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,066 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 265 times [2021-06-05 14:33:32,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:32,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072609526] [2021-06-05 14:33:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:32,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072609526] [2021-06-05 14:33:32,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072609526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636798241] [2021-06-05 14:33:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:32,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:32,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,251 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:33:32,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:32,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:32,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:32,262 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636798241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:32,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:32,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768468034] [2021-06-05 14:33:32,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:32,297 INFO L87 Difference]: Start difference. First operand 322 states and 970 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:32,448 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-06-05 14:33:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:32,449 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:33:32,449 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:33:32,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:33:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 336. [2021-06-05 14:33:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.0417910447761196) internal successors, (1019), 335 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1019 transitions. [2021-06-05 14:33:32,453 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1019 transitions. Word has length 20 [2021-06-05 14:33:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:32,453 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1019 transitions. [2021-06-05 14:33:32,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1019 transitions. [2021-06-05 14:33:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:32,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:32,453 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:32,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2555 [2021-06-05 14:33:32,654 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 266 times [2021-06-05 14:33:32,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:32,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139926842] [2021-06-05 14:33:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139926842] [2021-06-05 14:33:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139926842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934302499] [2021-06-05 14:33:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:32,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:32,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:32,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,858 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 14:33:32,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:32,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,879 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 14:33:32,879 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 14:33:32,879 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:32,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:32,880 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:33:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934302499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:32,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:32,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315447572] [2021-06-05 14:33:32,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:32,922 INFO L87 Difference]: Start difference. First operand 336 states and 1019 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,168 INFO L93 Difference]: Finished difference Result 536 states and 1528 transitions. [2021-06-05 14:33:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,169 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:33:33,169 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:33:33,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:33:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 342. [2021-06-05 14:33:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.06158357771261) internal successors, (1044), 341 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1044 transitions. [2021-06-05 14:33:33,173 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1044 transitions. Word has length 20 [2021-06-05 14:33:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1044 transitions. [2021-06-05 14:33:33,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1044 transitions. [2021-06-05 14:33:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:33,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,173 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:33,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2564 [2021-06-05 14:33:33,374 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 267 times [2021-06-05 14:33:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:33,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962926180] [2021-06-05 14:33:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:33,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:33,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962926180] [2021-06-05 14:33:33,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962926180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992255810] [2021-06-05 14:33:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:33,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:33,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,605 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:33:33,605 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 14:33:33,605 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 14:33:33,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:33,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:33,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,626 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:33,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:33,627 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:33:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:33,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992255810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:33,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421722613] [2021-06-05 14:33:33,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:33,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:33,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:33,666 INFO L87 Difference]: Start difference. First operand 342 states and 1044 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,804 INFO L93 Difference]: Finished difference Result 493 states and 1419 transitions. [2021-06-05 14:33:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,805 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:33:33,805 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:33:33,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:33:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 340. [2021-06-05 14:33:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0471976401179943) internal successors, (1033), 339 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1033 transitions. [2021-06-05 14:33:33,808 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1033 transitions. Word has length 20 [2021-06-05 14:33:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,808 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1033 transitions. [2021-06-05 14:33:33,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1033 transitions. [2021-06-05 14:33:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:33,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,809 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:34,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,009 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 268 times [2021-06-05 14:33:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309978595] [2021-06-05 14:33:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309978595] [2021-06-05 14:33:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309978595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021606720] [2021-06-05 14:33:34,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:34,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:34,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:34,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,202 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.3 percent of original size [2021-06-05 14:33:34,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:34,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,224 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 14:33:34,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:34,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 14:33:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021606720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:34,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:33:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41704327] [2021-06-05 14:33:34,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:34,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:34,276 INFO L87 Difference]: Start difference. First operand 340 states and 1033 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:34,580 INFO L93 Difference]: Finished difference Result 438 states and 1286 transitions. [2021-06-05 14:33:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:34,581 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:33:34,581 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:33:34,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:33:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 331. [2021-06-05 14:33:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0242424242424244) internal successors, (998), 330 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 14:33:34,584 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 14:33:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:34,584 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 14:33:34,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 14:33:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:34,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:34,585 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:34,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 14:33:34,785 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 269 times [2021-06-05 14:33:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:34,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901164934] [2021-06-05 14:33:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901164934] [2021-06-05 14:33:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901164934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310735610] [2021-06-05 14:33:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:34,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:34,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:34,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,976 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 14:33:34,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-06-05 14:33:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:34,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:34,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,999 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:34,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:34,999 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:35,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310735610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:35,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:33:35,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330066244] [2021-06-05 14:33:35,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:35,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:35,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:35,050 INFO L87 Difference]: Start difference. First operand 331 states and 998 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:35,236 INFO L93 Difference]: Finished difference Result 586 states and 1687 transitions. [2021-06-05 14:33:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:35,237 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:33:35,237 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:33:35,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:33:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 337. [2021-06-05 14:33:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0416666666666665) internal successors, (1022), 336 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1022 transitions. [2021-06-05 14:33:35,241 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1022 transitions. Word has length 20 [2021-06-05 14:33:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1022 transitions. [2021-06-05 14:33:35,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1022 transitions. [2021-06-05 14:33:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:35,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:35,242 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:35,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2599,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:35,442 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:35,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 270 times [2021-06-05 14:33:35,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:35,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033459036] [2021-06-05 14:33:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033459036] [2021-06-05 14:33:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033459036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453607661] [2021-06-05 14:33:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:35,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:35,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:35,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:35,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:35,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:35,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,653 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:33:35,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:35,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:35,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,674 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:35,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:35,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:35,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453607661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:35,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785902642] [2021-06-05 14:33:35,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:35,719 INFO L87 Difference]: Start difference. First operand 337 states and 1022 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:35,849 INFO L93 Difference]: Finished difference Result 553 states and 1605 transitions. [2021-06-05 14:33:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:35,849 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:33:35,850 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:33:35,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:33:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 340. [2021-06-05 14:33:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0589970501474926) internal successors, (1037), 339 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1037 transitions. [2021-06-05 14:33:35,854 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1037 transitions. Word has length 20 [2021-06-05 14:33:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:35,854 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1037 transitions. [2021-06-05 14:33:35,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1037 transitions. [2021-06-05 14:33:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:35,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:35,854 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:36,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,055 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 271 times [2021-06-05 14:33:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:36,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269332529] [2021-06-05 14:33:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:36,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269332529] [2021-06-05 14:33:36,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269332529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874220051] [2021-06-05 14:33:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:36,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:36,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,241 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:33:36,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:36,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:36,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:36,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:36,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874220051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:36,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:33:36,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077796440] [2021-06-05 14:33:36,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:36,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:36,298 INFO L87 Difference]: Start difference. First operand 340 states and 1037 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:36,448 INFO L93 Difference]: Finished difference Result 520 states and 1528 transitions. [2021-06-05 14:33:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:36,449 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:33:36,449 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:33:36,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:33:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 331. [2021-06-05 14:33:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.0242424242424244) internal successors, (998), 330 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 14:33:36,453 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 14:33:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:36,453 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 14:33:36,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 14:33:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:36,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:36,454 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:36,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2620,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,654 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 272 times [2021-06-05 14:33:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:36,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234175546] [2021-06-05 14:33:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:36,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:36,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234175546] [2021-06-05 14:33:36,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234175546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993220444] [2021-06-05 14:33:36,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:36,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:36,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,855 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:33:36,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-06-05 14:33:36,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:36,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:36,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,876 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:36,877 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:36,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:36,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:33:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:36,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993220444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:36,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:36,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923393467] [2021-06-05 14:33:36,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:36,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:36,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:36,947 INFO L87 Difference]: Start difference. First operand 331 states and 998 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:37,245 INFO L93 Difference]: Finished difference Result 651 states and 1812 transitions. [2021-06-05 14:33:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:37,246 INFO L225 Difference]: With dead ends: 651 [2021-06-05 14:33:37,246 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 14:33:37,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 14:33:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 339. [2021-06-05 14:33:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.059171597633136) internal successors, (1034), 338 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1034 transitions. [2021-06-05 14:33:37,251 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1034 transitions. Word has length 20 [2021-06-05 14:33:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:37,251 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1034 transitions. [2021-06-05 14:33:37,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1034 transitions. [2021-06-05 14:33:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:37,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:37,251 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:37,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,452 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 273 times [2021-06-05 14:33:37,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:37,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820904173] [2021-06-05 14:33:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:37,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:37,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820904173] [2021-06-05 14:33:37,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820904173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695795882] [2021-06-05 14:33:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:37,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:37,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:37,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:37,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,649 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 14:33:37,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:37,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:37,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:37,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,690 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:33:37,691 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:37,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:37,691 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 14:33:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695795882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:37,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171007006] [2021-06-05 14:33:37,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:37,764 INFO L87 Difference]: Start difference. First operand 339 states and 1034 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:37,951 INFO L93 Difference]: Finished difference Result 585 states and 1658 transitions. [2021-06-05 14:33:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:37,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:37,952 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:33:37,952 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:33:37,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:33:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 14:33:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.039156626506024) internal successors, (1009), 332 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 14:33:37,956 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 14:33:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:37,956 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 14:33:37,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 14:33:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:37,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:37,957 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:38,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-06-05 14:33:38,157 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 274 times [2021-06-05 14:33:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:38,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693992517] [2021-06-05 14:33:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:38,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693992517] [2021-06-05 14:33:38,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693992517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916145027] [2021-06-05 14:33:38,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:38,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:38,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:38,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,370 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 14:33:38,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:38,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:38,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,397 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-06-05 14:33:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:38,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:38,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:38,407 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 14:33:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916145027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:38,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:38,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420119694] [2021-06-05 14:33:38,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:38,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:38,483 INFO L87 Difference]: Start difference. First operand 333 states and 1009 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:38,689 INFO L93 Difference]: Finished difference Result 610 states and 1747 transitions. [2021-06-05 14:33:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:38,690 INFO L225 Difference]: With dead ends: 610 [2021-06-05 14:33:38,690 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 14:33:38,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 14:33:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 336. [2021-06-05 14:33:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.056716417910448) internal successors, (1024), 335 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-06-05 14:33:38,695 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-06-05 14:33:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:38,695 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-06-05 14:33:38,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-06-05 14:33:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:38,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:38,695 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:38,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-06-05 14:33:38,896 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 275 times [2021-06-05 14:33:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:38,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664114941] [2021-06-05 14:33:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664114941] [2021-06-05 14:33:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664114941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440671684] [2021-06-05 14:33:38,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:39,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:39,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:39,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:39,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,093 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 14:33:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:39,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,115 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 14:33:39,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-06-05 14:33:39,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:39,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:39,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:39,125 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 14:33:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:39,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440671684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:39,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:39,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735664884] [2021-06-05 14:33:39,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:39,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:39,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:39,196 INFO L87 Difference]: Start difference. First operand 336 states and 1024 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:39,353 INFO L93 Difference]: Finished difference Result 579 states and 1680 transitions. [2021-06-05 14:33:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:39,354 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:33:39,354 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:33:39,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:33:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 14:33:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.039156626506024) internal successors, (1009), 332 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 14:33:39,358 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 14:33:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:39,358 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 14:33:39,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 14:33:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:39,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:39,359 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:39,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2663 [2021-06-05 14:33:39,559 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:39,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 276 times [2021-06-05 14:33:39,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:39,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768239070] [2021-06-05 14:33:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:39,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768239070] [2021-06-05 14:33:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768239070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568706249] [2021-06-05 14:33:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:39,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:39,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:39,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:39,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,789 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:33:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:39,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:39,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,813 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:33:39,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:39,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:33:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:39,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568706249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:39,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:39,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703006254] [2021-06-05 14:33:39,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:39,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:39,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:39,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:39,890 INFO L87 Difference]: Start difference. First operand 333 states and 1009 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:40,073 INFO L93 Difference]: Finished difference Result 533 states and 1527 transitions. [2021-06-05 14:33:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:40,074 INFO L225 Difference]: With dead ends: 533 [2021-06-05 14:33:40,074 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 14:33:40,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 14:33:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 337. [2021-06-05 14:33:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.044642857142857) internal successors, (1023), 336 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1023 transitions. [2021-06-05 14:33:40,078 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1023 transitions. Word has length 20 [2021-06-05 14:33:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:40,078 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1023 transitions. [2021-06-05 14:33:40,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1023 transitions. [2021-06-05 14:33:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:40,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:40,079 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:40,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-06-05 14:33:40,279 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 277 times [2021-06-05 14:33:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:40,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466994373] [2021-06-05 14:33:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:40,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:40,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466994373] [2021-06-05 14:33:40,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466994373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38830796] [2021-06-05 14:33:40,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:40,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:40,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,474 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 14:33:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:40,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:33:40,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:40,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,516 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:33:40,516 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:33:40,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:40,517 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 14:33:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:40,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38830796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:40,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203286146] [2021-06-05 14:33:40,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:40,584 INFO L87 Difference]: Start difference. First operand 337 states and 1023 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:40,774 INFO L93 Difference]: Finished difference Result 539 states and 1548 transitions. [2021-06-05 14:33:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:40,775 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:33:40,775 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:33:40,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:33:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 14:33:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0362537764350455) internal successors, (1005), 331 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-06-05 14:33:40,779 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-06-05 14:33:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:40,779 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-06-05 14:33:40,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-06-05 14:33:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:40,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:40,779 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-06-05 14:33:40,980 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 278 times [2021-06-05 14:33:40,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:40,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602339489] [2021-06-05 14:33:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602339489] [2021-06-05 14:33:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602339489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659835408] [2021-06-05 14:33:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:41,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:41,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:41,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,169 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:33:41,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:41,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:33:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659835408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:41,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:33:41,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079729351] [2021-06-05 14:33:41,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:41,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:41,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:41,202 INFO L87 Difference]: Start difference. First operand 332 states and 1005 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,372 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-06-05 14:33:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,372 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:33:41,373 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:33:41,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:33:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-06-05 14:33:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0269461077844313) internal successors, (1011), 334 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-06-05 14:33:41,376 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-06-05 14:33:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,376 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-06-05 14:33:41,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-06-05 14:33:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:41,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,377 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:41,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,577 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 279 times [2021-06-05 14:33:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:41,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411534321] [2021-06-05 14:33:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411534321] [2021-06-05 14:33:41,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411534321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941658622] [2021-06-05 14:33:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:41,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,759 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:33:41,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:41,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:33:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941658622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:41,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:41,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422561211] [2021-06-05 14:33:41,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:41,808 INFO L87 Difference]: Start difference. First operand 335 states and 1011 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,963 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-06-05 14:33:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,964 INFO L225 Difference]: With dead ends: 473 [2021-06-05 14:33:41,964 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 14:33:41,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 14:33:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-06-05 14:33:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-06-05 14:33:41,968 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-06-05 14:33:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,968 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-06-05 14:33:41,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-06-05 14:33:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:41,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,969 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:42,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-06-05 14:33:42,169 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 280 times [2021-06-05 14:33:42,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:42,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173492753] [2021-06-05 14:33:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173492753] [2021-06-05 14:33:42,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173492753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105467362] [2021-06-05 14:33:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:42,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:42,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:42,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:42,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,365 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:33:42,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:42,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:33:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105467362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:42,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059549868] [2021-06-05 14:33:42,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:42,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:42,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:42,413 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:42,574 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-06-05 14:33:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:42,574 INFO L225 Difference]: With dead ends: 430 [2021-06-05 14:33:42,574 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 14:33:42,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 14:33:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-06-05 14:33:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 14:33:42,578 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-06-05 14:33:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:42,578 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 14:33:42,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 14:33:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:42,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:42,578 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:42,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-06-05 14:33:42,779 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 281 times [2021-06-05 14:33:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:42,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081367548] [2021-06-05 14:33:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081367548] [2021-06-05 14:33:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081367548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720911906] [2021-06-05 14:33:42,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720911906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557582863] [2021-06-05 14:33:42,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:42,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:42,979 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:43,131 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-06-05 14:33:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:43,132 INFO L225 Difference]: With dead ends: 383 [2021-06-05 14:33:43,132 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 14:33:43,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 14:33:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-06-05 14:33:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 14:33:43,135 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 14:33:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:43,135 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 14:33:43,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 14:33:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:43,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:43,136 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:43,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,336 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 282 times [2021-06-05 14:33:43,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:43,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811957631] [2021-06-05 14:33:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811957631] [2021-06-05 14:33:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811957631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567656164] [2021-06-05 14:33:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:43,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567656164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:43,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132523902] [2021-06-05 14:33:43,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:43,542 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:43,705 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-06-05 14:33:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:43,705 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:33:43,705 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:33:43,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:33:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-06-05 14:33:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0) internal successors, (957), 319 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-06-05 14:33:43,709 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-06-05 14:33:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:43,709 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-06-05 14:33:43,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-06-05 14:33:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:43,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:43,709 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:43,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,910 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:43,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 283 times [2021-06-05 14:33:43,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:43,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812944577] [2021-06-05 14:33:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812944577] [2021-06-05 14:33:43,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812944577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349456908] [2021-06-05 14:33:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:44,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349456908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:44,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:44,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657593210] [2021-06-05 14:33:44,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:44,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:44,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:44,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:44,108 INFO L87 Difference]: Start difference. First operand 320 states and 957 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:44,250 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-06-05 14:33:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:44,251 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:33:44,251 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 14:33:44,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 14:33:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-06-05 14:33:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.990322580645161) internal successors, (927), 310 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-06-05 14:33:44,254 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-06-05 14:33:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:44,254 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-06-05 14:33:44,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-06-05 14:33:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:44,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:44,255 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:44,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-06-05 14:33:44,455 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 284 times [2021-06-05 14:33:44,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:44,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606045493] [2021-06-05 14:33:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:44,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:44,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606045493] [2021-06-05 14:33:44,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606045493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331646010] [2021-06-05 14:33:44,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:44,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:44,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331646010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:44,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:44,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427173119] [2021-06-05 14:33:44,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:44,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:44,689 INFO L87 Difference]: Start difference. First operand 311 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:44,909 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-06-05 14:33:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:44,910 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:33:44,910 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:33:44,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:33:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-06-05 14:33:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0375) internal successors, (972), 320 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-06-05 14:33:44,914 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-06-05 14:33:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:44,914 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-06-05 14:33:44,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-06-05 14:33:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:44,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:44,914 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:45,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,115 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 285 times [2021-06-05 14:33:45,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:45,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596956900] [2021-06-05 14:33:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:45,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596956900] [2021-06-05 14:33:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596956900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470804971] [2021-06-05 14:33:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:45,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:45,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:45,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470804971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:45,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782690084] [2021-06-05 14:33:45,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:45,345 INFO L87 Difference]: Start difference. First operand 321 states and 972 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:45,496 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-06-05 14:33:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:45,497 INFO L225 Difference]: With dead ends: 455 [2021-06-05 14:33:45,497 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 14:33:45,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 14:33:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-06-05 14:33:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 14:33:45,500 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 14:33:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:45,501 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 14:33:45,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 14:33:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:45,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:45,501 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:45,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,701 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 286 times [2021-06-05 14:33:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:45,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530216859] [2021-06-05 14:33:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:45,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530216859] [2021-06-05 14:33:45,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530216859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868435015] [2021-06-05 14:33:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:45,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:45,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868435015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:45,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:45,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152339129] [2021-06-05 14:33:45,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:45,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:45,920 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:46,106 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-06-05 14:33:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:46,107 INFO L225 Difference]: With dead ends: 526 [2021-06-05 14:33:46,107 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:33:46,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:33:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-06-05 14:33:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0337423312883436) internal successors, (989), 326 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-06-05 14:33:46,111 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-06-05 14:33:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:46,111 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-06-05 14:33:46,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-06-05 14:33:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:46,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:46,112 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:46,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2742,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:46,312 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 287 times [2021-06-05 14:33:46,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:46,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070657194] [2021-06-05 14:33:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:46,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:46,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070657194] [2021-06-05 14:33:46,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070657194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049519627] [2021-06-05 14:33:46,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:46,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049519627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:46,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435070822] [2021-06-05 14:33:46,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:46,554 INFO L87 Difference]: Start difference. First operand 327 states and 989 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:46,685 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-06-05 14:33:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:46,686 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:33:46,686 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:33:46,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:33:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-06-05 14:33:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 14:33:46,690 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 14:33:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:46,690 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 14:33:46,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 14:33:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:46,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:46,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:46,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-06-05 14:33:46,891 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 288 times [2021-06-05 14:33:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628927874] [2021-06-05 14:33:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:46,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:46,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628927874] [2021-06-05 14:33:46,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628927874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333177526] [2021-06-05 14:33:46,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:47,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333177526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:47,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286296247] [2021-06-05 14:33:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:47,120 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:47,279 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-06-05 14:33:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:47,280 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:33:47,280 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:33:47,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:33:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-06-05 14:33:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.021406727828746) internal successors, (988), 327 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-06-05 14:33:47,284 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-06-05 14:33:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:47,284 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-06-05 14:33:47,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-06-05 14:33:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:47,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:47,284 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:47,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,485 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 289 times [2021-06-05 14:33:47,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:47,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305150849] [2021-06-05 14:33:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:47,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:47,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305150849] [2021-06-05 14:33:47,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305150849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736730781] [2021-06-05 14:33:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:47,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736730781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:47,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494732038] [2021-06-05 14:33:47,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:47,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:47,692 INFO L87 Difference]: Start difference. First operand 328 states and 988 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:47,921 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-06-05 14:33:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:47,922 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:33:47,922 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:33:47,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:33:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-06-05 14:33:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 14:33:47,926 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 14:33:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:47,926 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 14:33:47,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 14:33:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:47,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:47,927 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:48,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-06-05 14:33:48,127 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 290 times [2021-06-05 14:33:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:48,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112796776] [2021-06-05 14:33:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:48,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112796776] [2021-06-05 14:33:48,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112796776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138236781] [2021-06-05 14:33:48,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:48,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138236781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:48,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:48,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028453173] [2021-06-05 14:33:48,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:48,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:48,349 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:48,517 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-06-05 14:33:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:48,518 INFO L225 Difference]: With dead ends: 431 [2021-06-05 14:33:48,518 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:33:48,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:33:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-06-05 14:33:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0153846153846153) internal successors, (980), 325 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-06-05 14:33:48,522 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-06-05 14:33:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:48,522 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-06-05 14:33:48,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-06-05 14:33:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:48,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:48,522 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:48,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2774,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:48,723 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 291 times [2021-06-05 14:33:48,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:48,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515242792] [2021-06-05 14:33:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515242792] [2021-06-05 14:33:48,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515242792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020282801] [2021-06-05 14:33:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:48,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020282801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:48,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:48,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567319025] [2021-06-05 14:33:48,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:48,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:48,933 INFO L87 Difference]: Start difference. First operand 326 states and 980 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:49,110 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-06-05 14:33:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:49,110 INFO L225 Difference]: With dead ends: 425 [2021-06-05 14:33:49,110 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 14:33:49,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 14:33:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-06-05 14:33:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0031847133757963) internal successors, (943), 314 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-06-05 14:33:49,114 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-06-05 14:33:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:49,114 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-06-05 14:33:49,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-06-05 14:33:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:49,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:49,114 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:49,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:49,315 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 292 times [2021-06-05 14:33:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:49,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264567558] [2021-06-05 14:33:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:49,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:49,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264567558] [2021-06-05 14:33:49,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264567558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292887870] [2021-06-05 14:33:49,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:49,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:49,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:49,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292887870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:49,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:49,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020028645] [2021-06-05 14:33:49,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:49,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:49,551 INFO L87 Difference]: Start difference. First operand 315 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:49,704 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-06-05 14:33:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:49,705 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:33:49,705 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 14:33:49,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 14:33:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-06-05 14:33:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-06-05 14:33:49,708 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-06-05 14:33:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:49,708 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-06-05 14:33:49,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-06-05 14:33:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:49,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:49,709 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:49,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:49,909 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 293 times [2021-06-05 14:33:49,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:49,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523747627] [2021-06-05 14:33:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:49,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523747627] [2021-06-05 14:33:49,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523747627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222029245] [2021-06-05 14:33:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:50,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:50,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:50,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222029245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:50,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914752463] [2021-06-05 14:33:50,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:50,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:50,110 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:50,256 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-06-05 14:33:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:50,256 INFO L225 Difference]: With dead ends: 393 [2021-06-05 14:33:50,256 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:33:50,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:33:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-06-05 14:33:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-05 14:33:50,260 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-05 14:33:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:50,260 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-05 14:33:50,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-05 14:33:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:50,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:50,260 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:50,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,461 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 294 times [2021-06-05 14:33:50,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:50,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754923469] [2021-06-05 14:33:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:50,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:50,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754923469] [2021-06-05 14:33:50,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754923469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393389427] [2021-06-05 14:33:50,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:50,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:50,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393389427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:50,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955050071] [2021-06-05 14:33:50,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:50,668 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:50,838 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-06-05 14:33:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:50,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:50,839 INFO L225 Difference]: With dead ends: 399 [2021-06-05 14:33:50,839 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:33:50,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:33:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-06-05 14:33:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9876160990712073) internal successors, (965), 323 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-06-05 14:33:50,843 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-06-05 14:33:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:50,843 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-06-05 14:33:50,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-06-05 14:33:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:50,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:50,843 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:51,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-06-05 14:33:51,044 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 295 times [2021-06-05 14:33:51,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:51,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139260676] [2021-06-05 14:33:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:51,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139260676] [2021-06-05 14:33:51,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139260676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699323740] [2021-06-05 14:33:51,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:51,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699323740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:51,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845173796] [2021-06-05 14:33:51,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:51,245 INFO L87 Difference]: Start difference. First operand 324 states and 965 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:51,410 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-06-05 14:33:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:51,411 INFO L225 Difference]: With dead ends: 368 [2021-06-05 14:33:51,411 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:33:51,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:33:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-06-05 14:33:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.99025974025974) internal successors, (921), 308 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-06-05 14:33:51,414 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-06-05 14:33:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:51,414 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-06-05 14:33:51,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-06-05 14:33:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:51,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:51,414 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:51,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,615 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 296 times [2021-06-05 14:33:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:51,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198496459] [2021-06-05 14:33:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:51,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:51,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198496459] [2021-06-05 14:33:51,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198496459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909813287] [2021-06-05 14:33:51,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:51,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909813287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:51,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:51,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885152671] [2021-06-05 14:33:51,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:51,863 INFO L87 Difference]: Start difference. First operand 309 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:52,112 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-06-05 14:33:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:52,113 INFO L225 Difference]: With dead ends: 369 [2021-06-05 14:33:52,113 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:33:52,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:33:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-06-05 14:33:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0126582278481013) internal successors, (952), 316 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-06-05 14:33:52,116 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-06-05 14:33:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:52,116 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-06-05 14:33:52,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-06-05 14:33:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:52,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:52,116 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:52,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:52,317 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 297 times [2021-06-05 14:33:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:52,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117166886] [2021-06-05 14:33:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:52,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:52,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117166886] [2021-06-05 14:33:52,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117166886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165486715] [2021-06-05 14:33:52,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:52,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:52,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165486715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:52,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814140686] [2021-06-05 14:33:52,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:52,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:52,574 INFO L87 Difference]: Start difference. First operand 317 states and 952 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:52,821 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-06-05 14:33:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:52,822 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:33:52,822 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:33:52,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:33:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-06-05 14:33:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 14:33:52,825 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 14:33:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:52,825 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 14:33:52,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 14:33:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:52,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:52,826 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:53,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2821 [2021-06-05 14:33:53,042 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 298 times [2021-06-05 14:33:53,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:53,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834227920] [2021-06-05 14:33:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:53,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:53,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834227920] [2021-06-05 14:33:53,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834227920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744465966] [2021-06-05 14:33:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:53,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:53,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744465966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:53,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:53,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:53,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567366437] [2021-06-05 14:33:53,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:53,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:53,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:53,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:53,312 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:53,642 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 14:33:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:53,643 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:33:53,643 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:33:53,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:33:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-06-05 14:33:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 14:33:53,647 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 14:33:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:53,647 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 14:33:53,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 14:33:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:53,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:53,647 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:53,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2833,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:53,848 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 299 times [2021-06-05 14:33:53,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:53,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063037022] [2021-06-05 14:33:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:53,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:53,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063037022] [2021-06-05 14:33:53,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063037022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:53,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106800658] [2021-06-05 14:33:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:53,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:54,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106800658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:54,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:54,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377419525] [2021-06-05 14:33:54,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:54,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:54,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:54,132 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:54,342 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-06-05 14:33:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:54,343 INFO L225 Difference]: With dead ends: 456 [2021-06-05 14:33:54,343 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:33:54,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:33:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-06-05 14:33:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0377358490566038) internal successors, (966), 318 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-06-05 14:33:54,347 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-06-05 14:33:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:54,347 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-06-05 14:33:54,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-06-05 14:33:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:54,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:54,347 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:54,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-05 14:33:54,548 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:54,548 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 300 times [2021-06-05 14:33:54,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:54,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612968301] [2021-06-05 14:33:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:54,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612968301] [2021-06-05 14:33:54,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612968301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617086622] [2021-06-05 14:33:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:54,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617086622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:54,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186371834] [2021-06-05 14:33:54,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:54,830 INFO L87 Difference]: Start difference. First operand 319 states and 966 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:55,028 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-06-05 14:33:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:55,029 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:33:55,029 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:33:55,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:33:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-06-05 14:33:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.015576323987539) internal successors, (968), 321 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-06-05 14:33:55,033 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-06-05 14:33:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:55,033 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-06-05 14:33:55,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-06-05 14:33:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:55,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:55,033 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:55,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:55,234 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 301 times [2021-06-05 14:33:55,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:55,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840950818] [2021-06-05 14:33:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:55,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840950818] [2021-06-05 14:33:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840950818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471359794] [2021-06-05 14:33:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:55,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471359794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:55,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:55,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732311994] [2021-06-05 14:33:55,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:55,504 INFO L87 Difference]: Start difference. First operand 322 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:55,679 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-06-05 14:33:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:55,680 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:33:55,680 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:33:55,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:33:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-06-05 14:33:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0254777070063694) internal successors, (950), 314 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-06-05 14:33:55,683 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-06-05 14:33:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:55,683 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-06-05 14:33:55,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-06-05 14:33:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:55,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:55,684 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:55,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-06-05 14:33:55,884 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:55,884 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 302 times [2021-06-05 14:33:55,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:55,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443549035] [2021-06-05 14:33:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:55,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:55,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443549035] [2021-06-05 14:33:55,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443549035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443508358] [2021-06-05 14:33:55,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:56,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:56,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443508358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:56,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030867529] [2021-06-05 14:33:56,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:56,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:56,143 INFO L87 Difference]: Start difference. First operand 315 states and 950 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:56,339 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-06-05 14:33:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:56,340 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:33:56,340 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:33:56,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:33:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 14:33:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 14:33:56,343 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 14:33:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:56,344 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 14:33:56,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 14:33:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:56,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:56,344 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:56,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2885 [2021-06-05 14:33:56,544 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 303 times [2021-06-05 14:33:56,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:56,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598485916] [2021-06-05 14:33:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:56,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:56,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598485916] [2021-06-05 14:33:56,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598485916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960413688] [2021-06-05 14:33:56,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:56,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:56,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:56,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:56,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960413688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:56,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952171206] [2021-06-05 14:33:56,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:56,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:56,804 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:56,994 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-06-05 14:33:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:56,994 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:33:56,994 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:33:56,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:33:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-06-05 14:33:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9968847352024923) internal successors, (962), 321 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-06-05 14:33:56,998 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-06-05 14:33:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:56,998 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-06-05 14:33:56,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-06-05 14:33:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:56,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:56,999 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:57,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-06-05 14:33:57,199 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 304 times [2021-06-05 14:33:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:57,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922078940] [2021-06-05 14:33:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:57,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922078940] [2021-06-05 14:33:57,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922078940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413005198] [2021-06-05 14:33:57,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:57,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413005198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:57,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:57,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468980266] [2021-06-05 14:33:57,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:57,444 INFO L87 Difference]: Start difference. First operand 322 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:57,625 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-06-05 14:33:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:57,626 INFO L225 Difference]: With dead ends: 401 [2021-06-05 14:33:57,626 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:33:57,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:33:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-06-05 14:33:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 14:33:57,629 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 14:33:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:57,629 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 14:33:57,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 14:33:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:57,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:57,630 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:57,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2904,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:57,830 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 305 times [2021-06-05 14:33:57,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:57,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100924939] [2021-06-05 14:33:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:57,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100924939] [2021-06-05 14:33:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100924939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859432120] [2021-06-05 14:33:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:57,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:57,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:58,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859432120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:58,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305159738] [2021-06-05 14:33:58,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:58,061 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:58,306 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-06-05 14:33:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:58,306 INFO L225 Difference]: With dead ends: 341 [2021-06-05 14:33:58,306 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:33:58,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:33:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-06-05 14:33:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-06-05 14:33:58,310 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-06-05 14:33:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:58,310 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-06-05 14:33:58,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-06-05 14:33:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:58,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:58,310 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:58,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:58,511 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 306 times [2021-06-05 14:33:58,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:58,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140318283] [2021-06-05 14:33:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:58,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140318283] [2021-06-05 14:33:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140318283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594376877] [2021-06-05 14:33:58,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:58,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:58,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594376877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610207765] [2021-06-05 14:33:58,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:58,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:58,784 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:59,103 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-06-05 14:33:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:59,103 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:33:59,103 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:33:59,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:33:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-06-05 14:33:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 14:33:59,107 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-06-05 14:33:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:59,107 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 14:33:59,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 14:33:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:59,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:59,107 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:59,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2922 [2021-06-05 14:33:59,313 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 307 times [2021-06-05 14:33:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:59,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335235762] [2021-06-05 14:33:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:59,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:59,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335235762] [2021-06-05 14:33:59,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335235762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:59,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127852870] [2021-06-05 14:33:59,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:33:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127852870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:59,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:59,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:33:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434823517] [2021-06-05 14:33:59,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:59,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:59,650 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:59,881 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-06-05 14:33:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:59,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:33:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:59,882 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:33:59,882 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:33:59,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:33:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-06-05 14:33:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 14:33:59,885 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 14:33:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:59,885 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 14:33:59,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 14:33:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:33:59,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:59,886 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:00,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,086 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 308 times [2021-06-05 14:34:00,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:00,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864995401] [2021-06-05 14:34:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:00,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:00,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864995401] [2021-06-05 14:34:00,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864995401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978443276] [2021-06-05 14:34:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:00,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:00,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978443276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:00,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589563139] [2021-06-05 14:34:00,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:00,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:00,303 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:00,420 INFO L93 Difference]: Finished difference Result 414 states and 1199 transitions. [2021-06-05 14:34:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:00,421 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:34:00,421 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:34:00,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:34:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 320. [2021-06-05 14:34:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.040752351097179) internal successors, (970), 319 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-06-05 14:34:00,424 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-06-05 14:34:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:00,424 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-06-05 14:34:00,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-06-05 14:34:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:00,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:00,425 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:00,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,625 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 309 times [2021-06-05 14:34:00,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:00,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799533248] [2021-06-05 14:34:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:00,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799533248] [2021-06-05 14:34:00,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799533248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890657239] [2021-06-05 14:34:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890657239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:00,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:00,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325588130] [2021-06-05 14:34:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:00,871 INFO L87 Difference]: Start difference. First operand 320 states and 970 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:01,036 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-06-05 14:34:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:01,037 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:34:01,037 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:34:01,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:34:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 14:34:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 14:34:01,040 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 14:34:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 14:34:01,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 14:34:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:01,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:01,041 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:01,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 14:34:01,241 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 310 times [2021-06-05 14:34:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:01,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019032353] [2021-06-05 14:34:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019032353] [2021-06-05 14:34:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019032353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707526908] [2021-06-05 14:34:01,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:01,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:01,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707526908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:01,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:01,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203665975] [2021-06-05 14:34:01,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:01,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:01,478 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:01,656 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-06-05 14:34:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:01,657 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:34:01,657 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:34:01,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:34:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-06-05 14:34:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.036923076923077) internal successors, (987), 325 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-06-05 14:34:01,661 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-06-05 14:34:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:01,661 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-06-05 14:34:01,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-06-05 14:34:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:01,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:01,662 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:01,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 14:34:01,862 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 311 times [2021-06-05 14:34:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:01,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894177977] [2021-06-05 14:34:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:01,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894177977] [2021-06-05 14:34:01,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894177977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39028844] [2021-06-05 14:34:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:01,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:01,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:02,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39028844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:02,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:02,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56187421] [2021-06-05 14:34:02,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:02,110 INFO L87 Difference]: Start difference. First operand 326 states and 987 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:02,329 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-06-05 14:34:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:02,330 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:34:02,330 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:34:02,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:34:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-06-05 14:34:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 14:34:02,334 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 14:34:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:02,334 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 14:34:02,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 14:34:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:02,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:02,334 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:02,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-06-05 14:34:02,535 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 312 times [2021-06-05 14:34:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:02,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266103278] [2021-06-05 14:34:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266103278] [2021-06-05 14:34:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266103278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192357853] [2021-06-05 14:34:02,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:02,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:02,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192357853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:02,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:02,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215705941] [2021-06-05 14:34:02,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:02,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:02,764 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:03,023 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-06-05 14:34:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:03,024 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:34:03,024 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:34:03,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:34:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-06-05 14:34:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0245398773006134) internal successors, (986), 326 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-06-05 14:34:03,028 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-06-05 14:34:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:03,028 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-06-05 14:34:03,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-06-05 14:34:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:03,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:03,029 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:03,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 14:34:03,229 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 313 times [2021-06-05 14:34:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663195657] [2021-06-05 14:34:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:03,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:03,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663195657] [2021-06-05 14:34:03,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663195657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:03,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072156101] [2021-06-05 14:34:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072156101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:03,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:03,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144087716] [2021-06-05 14:34:03,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:03,475 INFO L87 Difference]: Start difference. First operand 327 states and 986 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:03,689 INFO L93 Difference]: Finished difference Result 443 states and 1276 transitions. [2021-06-05 14:34:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:03,689 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:34:03,689 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:34:03,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:34:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 324. [2021-06-05 14:34:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.021671826625387) internal successors, (976), 323 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-06-05 14:34:03,693 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-06-05 14:34:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:03,693 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-06-05 14:34:03,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-06-05 14:34:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:03,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:03,694 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:03,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 14:34:03,894 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 314 times [2021-06-05 14:34:03,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:03,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729399234] [2021-06-05 14:34:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:03,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729399234] [2021-06-05 14:34:03,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729399234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942882643] [2021-06-05 14:34:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:04,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:04,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942882643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:04,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:04,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124999784] [2021-06-05 14:34:04,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:04,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:04,133 INFO L87 Difference]: Start difference. First operand 324 states and 976 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:04,271 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-06-05 14:34:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:04,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:04,272 INFO L225 Difference]: With dead ends: 396 [2021-06-05 14:34:04,272 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 14:34:04,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 14:34:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-06-05 14:34:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 14:34:04,276 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 14:34:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:04,276 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 14:34:04,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 14:34:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:04,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:04,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:04,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,476 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 315 times [2021-06-05 14:34:04,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:04,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195126711] [2021-06-05 14:34:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:04,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195126711] [2021-06-05 14:34:04,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195126711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762982350] [2021-06-05 14:34:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762982350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165973019] [2021-06-05 14:34:04,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:04,719 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:04,876 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-06-05 14:34:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:04,877 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:34:04,877 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:34:04,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:34:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-06-05 14:34:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 14:34:04,880 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 14:34:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:04,880 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 14:34:04,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 14:34:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:04,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:04,880 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:05,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3009,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,081 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:05,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 316 times [2021-06-05 14:34:05,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:05,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914991932] [2021-06-05 14:34:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:05,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:05,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914991932] [2021-06-05 14:34:05,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914991932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805813055] [2021-06-05 14:34:05,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805813055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:05,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889248671] [2021-06-05 14:34:05,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:05,293 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:05,423 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-06-05 14:34:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:05,424 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:34:05,424 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:34:05,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:34:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-06-05 14:34:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.996774193548387) internal successors, (929), 310 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-06-05 14:34:05,427 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-06-05 14:34:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:05,427 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-06-05 14:34:05,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-06-05 14:34:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:05,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:05,428 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:05,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 14:34:05,628 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 317 times [2021-06-05 14:34:05,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:05,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128894376] [2021-06-05 14:34:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:05,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128894376] [2021-06-05 14:34:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128894376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285846883] [2021-06-05 14:34:05,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:05,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285846883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:05,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:05,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825389509] [2021-06-05 14:34:05,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:05,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:05,863 INFO L87 Difference]: Start difference. First operand 311 states and 929 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:05,988 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-06-05 14:34:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:05,989 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:34:05,989 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:34:05,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:34:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-06-05 14:34:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9876543209876543) internal successors, (968), 324 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-06-05 14:34:05,992 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-06-05 14:34:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:05,992 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-06-05 14:34:05,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-06-05 14:34:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:05,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:05,993 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:06,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,193 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 318 times [2021-06-05 14:34:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:06,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072957594] [2021-06-05 14:34:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072957594] [2021-06-05 14:34:06,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072957594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380823243] [2021-06-05 14:34:06,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:06,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380823243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:06,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404921490] [2021-06-05 14:34:06,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:06,410 INFO L87 Difference]: Start difference. First operand 325 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:06,595 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-06-05 14:34:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:06,596 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:34:06,596 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 14:34:06,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 14:34:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-06-05 14:34:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 14:34:06,599 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-06-05 14:34:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:06,599 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 14:34:06,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 14:34:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:06,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:06,600 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:06,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,800 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 319 times [2021-06-05 14:34:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:06,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160331866] [2021-06-05 14:34:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160331866] [2021-06-05 14:34:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160331866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518570479] [2021-06-05 14:34:06,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518570479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:07,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:07,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932356531] [2021-06-05 14:34:07,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:07,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:07,040 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:07,176 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-06-05 14:34:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:07,177 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:34:07,177 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:34:07,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:34:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-06-05 14:34:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 14:34:07,180 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 14:34:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:07,180 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 14:34:07,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 14:34:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:07,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:07,180 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:07,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:07,381 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 320 times [2021-06-05 14:34:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999612972] [2021-06-05 14:34:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999612972] [2021-06-05 14:34:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999612972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647742255] [2021-06-05 14:34:07,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:07,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:07,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647742255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:07,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:07,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794452782] [2021-06-05 14:34:07,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:07,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:07,580 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:07,703 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-06-05 14:34:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:07,703 INFO L225 Difference]: With dead ends: 329 [2021-06-05 14:34:07,703 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:34:07,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:34:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-06-05 14:34:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.987220447284345) internal successors, (935), 313 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-06-05 14:34:07,706 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-06-05 14:34:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:07,707 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-06-05 14:34:07,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-06-05 14:34:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:07,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:07,707 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:07,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 14:34:07,907 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 321 times [2021-06-05 14:34:07,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:07,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680925091] [2021-06-05 14:34:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:07,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680925091] [2021-06-05 14:34:07,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680925091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797296554] [2021-06-05 14:34:07,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:08,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:08,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797296554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:08,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:08,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370807203] [2021-06-05 14:34:08,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:08,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:08,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:08,105 INFO L87 Difference]: Start difference. First operand 314 states and 935 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:08,244 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-06-05 14:34:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:08,245 INFO L225 Difference]: With dead ends: 354 [2021-06-05 14:34:08,245 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 14:34:08,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 14:34:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-06-05 14:34:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.978328173374613) internal successors, (962), 323 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-06-05 14:34:08,248 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-06-05 14:34:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:08,248 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-06-05 14:34:08,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-06-05 14:34:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:08,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:08,249 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:08,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 14:34:08,449 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 322 times [2021-06-05 14:34:08,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:08,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386802579] [2021-06-05 14:34:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:08,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:08,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386802579] [2021-06-05 14:34:08,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386802579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543242722] [2021-06-05 14:34:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:08,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:08,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:08,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543242722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:08,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533357847] [2021-06-05 14:34:08,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:08,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:08,650 INFO L87 Difference]: Start difference. First operand 324 states and 962 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:08,761 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-06-05 14:34:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:08,762 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:34:08,762 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 14:34:08,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:08,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 14:34:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-06-05 14:34:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.990353697749196) internal successors, (930), 311 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-06-05 14:34:08,765 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-06-05 14:34:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:08,765 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-06-05 14:34:08,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-06-05 14:34:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:08,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:08,766 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:08,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:08,966 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 323 times [2021-06-05 14:34:08,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:08,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888720180] [2021-06-05 14:34:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888720180] [2021-06-05 14:34:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888720180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020015726] [2021-06-05 14:34:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:09,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:09,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020015726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:09,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:09,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802383018] [2021-06-05 14:34:09,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:09,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:09,178 INFO L87 Difference]: Start difference. First operand 312 states and 930 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:09,308 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-06-05 14:34:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:09,309 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:34:09,309 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:34:09,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:34:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-06-05 14:34:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-05 14:34:09,312 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-05 14:34:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:09,313 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-05 14:34:09,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-05 14:34:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:09,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:09,313 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:09,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 14:34:09,513 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 324 times [2021-06-05 14:34:09,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:09,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099917811] [2021-06-05 14:34:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099917811] [2021-06-05 14:34:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099917811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786333117] [2021-06-05 14:34:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:09,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786333117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:09,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:09,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000531736] [2021-06-05 14:34:09,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:09,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:09,701 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:09,835 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-06-05 14:34:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:09,836 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:34:09,836 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:34:09,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:34:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-06-05 14:34:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.984520123839009) internal successors, (964), 323 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-06-05 14:34:09,839 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-06-05 14:34:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:09,839 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-06-05 14:34:09,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-06-05 14:34:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:09,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:09,840 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:10,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 14:34:10,040 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 325 times [2021-06-05 14:34:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:10,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932979746] [2021-06-05 14:34:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932979746] [2021-06-05 14:34:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932979746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904376964] [2021-06-05 14:34:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904376964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:10,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142018502] [2021-06-05 14:34:10,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:10,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:10,226 INFO L87 Difference]: Start difference. First operand 324 states and 964 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:10,337 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-06-05 14:34:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:10,338 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:34:10,338 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:34:10,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:34:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-06-05 14:34:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9901960784313726) internal successors, (915), 306 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-06-05 14:34:10,341 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-06-05 14:34:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:10,341 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-06-05 14:34:10,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-06-05 14:34:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:10,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:10,342 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:10,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:10,542 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 326 times [2021-06-05 14:34:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:10,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37152876] [2021-06-05 14:34:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:10,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37152876] [2021-06-05 14:34:10,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37152876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164204220] [2021-06-05 14:34:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:10,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:10,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:10,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,781 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 14:34:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:10,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:10,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,803 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:10,803 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:34:10,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:10,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 14:34:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164204220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:10,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:34:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299483208] [2021-06-05 14:34:10,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:10,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:10,866 INFO L87 Difference]: Start difference. First operand 307 states and 915 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:11,278 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-06-05 14:34:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:11,279 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:34:11,279 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 14:34:11,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 14:34:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-06-05 14:34:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 14:34:11,282 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 14:34:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:11,282 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 14:34:11,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 14:34:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:11,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:11,282 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:11,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 14:34:11,482 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 327 times [2021-06-05 14:34:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:11,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102953120] [2021-06-05 14:34:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:11,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:11,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102953120] [2021-06-05 14:34:11,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102953120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461458208] [2021-06-05 14:34:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:11,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:11,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:11,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:11,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,676 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 14:34:11,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:11,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,695 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 14:34:11,696 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-05 14:34:11,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:11,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:11,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461458208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:11,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:11,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810986127] [2021-06-05 14:34:11,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:11,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:11,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:11,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:11,732 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:11,922 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-06-05 14:34:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:11,923 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:34:11,923 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:34:11,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:34:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-06-05 14:34:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 14:34:11,926 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 14:34:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:11,926 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 14:34:11,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 14:34:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:11,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:11,927 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:12,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-06-05 14:34:12,127 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 328 times [2021-06-05 14:34:12,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:12,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775956791] [2021-06-05 14:34:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:12,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:12,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775956791] [2021-06-05 14:34:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775956791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943720394] [2021-06-05 14:34:12,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:12,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:12,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:12,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,330 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:34:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:12,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:12,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,355 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:12,355 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:34:12,355 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-05 14:34:12,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:12,356 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:34:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:12,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943720394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:12,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659323400] [2021-06-05 14:34:12,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:12,397 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:12,710 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-06-05 14:34:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:12,711 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:34:12,711 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:34:12,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:34:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-06-05 14:34:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 14:34:12,714 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 14:34:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:12,714 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 14:34:12,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 14:34:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:12,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:12,715 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:12,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-05 14:34:12,915 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:12,915 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 329 times [2021-06-05 14:34:12,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:12,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173497222] [2021-06-05 14:34:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:12,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:12,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173497222] [2021-06-05 14:34:12,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173497222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603841608] [2021-06-05 14:34:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:13,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:13,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:13,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:13,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,135 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:34:13,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:13,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,156 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:13,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:13,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603841608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:13,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035138042] [2021-06-05 14:34:13,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:13,196 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:13,406 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-06-05 14:34:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:13,407 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:34:13,407 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:34:13,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:34:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-06-05 14:34:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 14:34:13,410 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 14:34:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:13,411 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 14:34:13,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 14:34:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:13,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:13,411 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:13,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-06-05 14:34:13,611 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 330 times [2021-06-05 14:34:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:13,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947583026] [2021-06-05 14:34:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:13,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947583026] [2021-06-05 14:34:13,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947583026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845389438] [2021-06-05 14:34:13,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:13,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:13,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:13,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,806 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:34:13,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:13,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:13,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845389438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:13,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021311555] [2021-06-05 14:34:13,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:13,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:13,864 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:14,122 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-06-05 14:34:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:14,123 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:34:14,123 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:34:14,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:34:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-06-05 14:34:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.006514657980456) internal successors, (923), 307 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-06-05 14:34:14,127 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-06-05 14:34:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:14,127 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-06-05 14:34:14,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-06-05 14:34:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:14,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:14,127 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:14,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-05 14:34:14,328 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 331 times [2021-06-05 14:34:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:14,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734134401] [2021-06-05 14:34:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:14,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:14,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734134401] [2021-06-05 14:34:14,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734134401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:14,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340932162] [2021-06-05 14:34:14,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:14,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:14,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:14,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,549 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:34:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:14,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:14,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,571 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:14,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:14,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:14,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340932162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:14,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:14,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:14,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612019973] [2021-06-05 14:34:14,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:14,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:14,617 INFO L87 Difference]: Start difference. First operand 308 states and 923 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:14,814 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-06-05 14:34:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:14,815 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:34:14,815 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:34:14,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:34:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 14:34:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0258064516129033) internal successors, (938), 310 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-06-05 14:34:14,819 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-06-05 14:34:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:14,819 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-06-05 14:34:14,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-06-05 14:34:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:14,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:14,820 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:15,020 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 332 times [2021-06-05 14:34:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:15,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682964590] [2021-06-05 14:34:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:15,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682964590] [2021-06-05 14:34:15,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682964590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479783722] [2021-06-05 14:34:15,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:15,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:15,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,235 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 14:34:15,235 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:34:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:15,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:15,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:15,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,276 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:34:15,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:15,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 14:34:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479783722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:15,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337392294] [2021-06-05 14:34:15,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:15,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:15,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:15,320 INFO L87 Difference]: Start difference. First operand 311 states and 938 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:15,512 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-06-05 14:34:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:15,513 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:34:15,513 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:34:15,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:34:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-06-05 14:34:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 14:34:15,516 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 14:34:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:15,516 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 14:34:15,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 14:34:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:15,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:15,517 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:15,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 14:34:15,717 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 333 times [2021-06-05 14:34:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:15,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721207497] [2021-06-05 14:34:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721207497] [2021-06-05 14:34:15,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721207497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069140464] [2021-06-05 14:34:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:15,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:15,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:15,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,918 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 14:34:15,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:15,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:15,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,939 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:15,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-06-05 14:34:15,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:15,940 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:16,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069140464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:16,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:16,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199554976] [2021-06-05 14:34:16,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:16,011 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:16,388 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-06-05 14:34:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:16,388 INFO L225 Difference]: With dead ends: 615 [2021-06-05 14:34:16,389 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 14:34:16,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 14:34:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-06-05 14:34:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0258899676375406) internal successors, (935), 309 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-06-05 14:34:16,393 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-06-05 14:34:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:16,393 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-06-05 14:34:16,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-06-05 14:34:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:16,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:16,393 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:16,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:16,594 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 334 times [2021-06-05 14:34:16,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:16,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112067179] [2021-06-05 14:34:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:16,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112067179] [2021-06-05 14:34:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112067179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235697188] [2021-06-05 14:34:16,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:16,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:16,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:16,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,808 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 14:34:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:16,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,839 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:34:16,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:16,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:16,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,860 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:16,860 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:34:16,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:16,861 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:34:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:16,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235697188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:16,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:16,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:16,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224184605] [2021-06-05 14:34:16,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:16,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:16,930 INFO L87 Difference]: Start difference. First operand 310 states and 935 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:17,172 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-06-05 14:34:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:17,173 INFO L225 Difference]: With dead ends: 549 [2021-06-05 14:34:17,173 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:34:17,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:34:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 14:34:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 14:34:17,176 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 14:34:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:17,176 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 14:34:17,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 14:34:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:17,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:17,177 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:17,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 14:34:17,377 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 335 times [2021-06-05 14:34:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829311507] [2021-06-05 14:34:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:17,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829311507] [2021-06-05 14:34:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829311507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477056694] [2021-06-05 14:34:17,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:17,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:17,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:17,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:17,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,590 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 14:34:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:17,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,621 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:34:17,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:17,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:17,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,642 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:17,642 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:34:17,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:17,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:34:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:17,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477056694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:17,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090047238] [2021-06-05 14:34:17,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:17,718 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:17,958 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-06-05 14:34:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:17,959 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:34:17,959 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:34:17,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:34:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-06-05 14:34:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.022875816993464) internal successors, (925), 306 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-06-05 14:34:17,963 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-06-05 14:34:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:17,963 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-06-05 14:34:17,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-06-05 14:34:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:17,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:17,964 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:18,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 14:34:18,164 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 336 times [2021-06-05 14:34:18,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:18,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987816385] [2021-06-05 14:34:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:18,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987816385] [2021-06-05 14:34:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987816385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753806006] [2021-06-05 14:34:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:18,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:18,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,381 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 14:34:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:18,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:18,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,405 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:34:18,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 14:34:18,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-05 14:34:18,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:18,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:34:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753806006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:18,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331801747] [2021-06-05 14:34:18,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:18,487 INFO L87 Difference]: Start difference. First operand 307 states and 925 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:18,723 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-06-05 14:34:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:18,724 INFO L225 Difference]: With dead ends: 543 [2021-06-05 14:34:18,724 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:34:18,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:34:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 14:34:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 14:34:18,728 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 14:34:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 14:34:18,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 14:34:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:18,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:18,729 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 14:34:18,929 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 337 times [2021-06-05 14:34:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960262194] [2021-06-05 14:34:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:18,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:18,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960262194] [2021-06-05 14:34:18,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960262194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895425784] [2021-06-05 14:34:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:19,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:19,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:19,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:19,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:19,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:19,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,135 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:34:19,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:19,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:34:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895425784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:19,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574158782] [2021-06-05 14:34:19,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:19,207 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:19,408 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-06-05 14:34:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:19,409 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:34:19,409 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:34:19,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:34:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-06-05 14:34:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 14:34:19,412 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 14:34:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:19,413 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 14:34:19,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 14:34:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:19,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:19,413 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:19,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-06-05 14:34:19,613 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 338 times [2021-06-05 14:34:19,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:19,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692025498] [2021-06-05 14:34:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:19,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:19,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692025498] [2021-06-05 14:34:19,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692025498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:19,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864149011] [2021-06-05 14:34:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:19,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:19,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:19,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,833 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 14:34:19,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:34:19,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,864 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 14:34:19,864 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 14:34:19,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:19,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:19,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,886 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:34:19,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:19,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:34:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864149011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:19,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:19,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:19,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577108] [2021-06-05 14:34:19,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:19,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:19,955 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:20,245 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-06-05 14:34:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:20,246 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:34:20,246 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:34:20,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:34:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-06-05 14:34:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 14:34:20,250 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 14:34:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:20,250 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 14:34:20,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 14:34:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:20,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:20,250 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:20,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:20,451 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 339 times [2021-06-05 14:34:20,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:20,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038029914] [2021-06-05 14:34:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038029914] [2021-06-05 14:34:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038029914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205189540] [2021-06-05 14:34:20,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:20,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:20,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:20,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,642 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:20,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:20,643 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205189540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:20,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:20,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278596774] [2021-06-05 14:34:20,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:20,675 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:20,849 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-06-05 14:34:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:20,850 INFO L225 Difference]: With dead ends: 467 [2021-06-05 14:34:20,850 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 14:34:20,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 14:34:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-06-05 14:34:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0191082802547773) internal successors, (948), 314 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-06-05 14:34:20,854 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-06-05 14:34:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:20,854 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-06-05 14:34:20,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-06-05 14:34:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:20,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:20,854 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:21,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,054 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 340 times [2021-06-05 14:34:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:21,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278800011] [2021-06-05 14:34:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:21,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:21,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278800011] [2021-06-05 14:34:21,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278800011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99356657] [2021-06-05 14:34:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:21,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:21,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:21,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:21,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,241 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:21,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:21,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:21,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99356657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:21,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:21,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285714641] [2021-06-05 14:34:21,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:21,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:21,297 INFO L87 Difference]: Start difference. First operand 315 states and 948 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:21,518 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-06-05 14:34:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:21,519 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:34:21,519 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:34:21,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:34:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-06-05 14:34:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0378548895899056) internal successors, (963), 317 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-06-05 14:34:21,522 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-06-05 14:34:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:21,523 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-06-05 14:34:21,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-06-05 14:34:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:21,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:21,523 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:21,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,723 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 341 times [2021-06-05 14:34:21,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:21,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486768004] [2021-06-05 14:34:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:21,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486768004] [2021-06-05 14:34:21,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486768004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687422678] [2021-06-05 14:34:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:21,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:21,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:21,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,908 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:21,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:21,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:21,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687422678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:21,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:21,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000425950] [2021-06-05 14:34:21,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:21,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:21,956 INFO L87 Difference]: Start difference. First operand 318 states and 963 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:22,167 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-06-05 14:34:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:22,168 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:34:22,168 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:34:22,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:34:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-06-05 14:34:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 14:34:22,172 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 14:34:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:22,172 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 14:34:22,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 14:34:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:22,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:22,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:22,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3241,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:22,373 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 342 times [2021-06-05 14:34:22,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:22,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869994470] [2021-06-05 14:34:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:22,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869994470] [2021-06-05 14:34:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869994470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923046895] [2021-06-05 14:34:22,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:22,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:22,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923046895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:22,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:22,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396550378] [2021-06-05 14:34:22,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:22,581 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:22,771 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-06-05 14:34:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:22,771 INFO L225 Difference]: With dead ends: 381 [2021-06-05 14:34:22,771 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 14:34:22,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 14:34:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-06-05 14:34:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0286624203821657) internal successors, (951), 314 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-06-05 14:34:22,775 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-06-05 14:34:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:22,775 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-06-05 14:34:22,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-06-05 14:34:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:22,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:22,775 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-06-05 14:34:22,976 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 343 times [2021-06-05 14:34:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042373806] [2021-06-05 14:34:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:23,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042373806] [2021-06-05 14:34:23,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042373806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499368419] [2021-06-05 14:34:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:23,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:23,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499368419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:23,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:23,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461362639] [2021-06-05 14:34:23,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:23,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:23,186 INFO L87 Difference]: Start difference. First operand 315 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:23,402 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-06-05 14:34:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:23,403 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:34:23,403 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:34:23,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:34:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 14:34:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.009646302250804) internal successors, (936), 311 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-06-05 14:34:23,407 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-06-05 14:34:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:23,407 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-06-05 14:34:23,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-06-05 14:34:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:23,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:23,407 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:23,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-06-05 14:34:23,608 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 344 times [2021-06-05 14:34:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:23,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382285816] [2021-06-05 14:34:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382285816] [2021-06-05 14:34:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382285816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156466519] [2021-06-05 14:34:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:23,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:23,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156466519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:23,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:23,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107087207] [2021-06-05 14:34:23,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:23,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:23,808 INFO L87 Difference]: Start difference. First operand 312 states and 936 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:23,994 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-06-05 14:34:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:23,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:23,995 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:34:23,995 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:34:23,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:34:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-06-05 14:34:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 14:34:23,998 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 14:34:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:23,999 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 14:34:23,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 14:34:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:23,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:23,999 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:24,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,200 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 345 times [2021-06-05 14:34:24,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:24,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308078773] [2021-06-05 14:34:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:24,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308078773] [2021-06-05 14:34:24,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308078773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086126579] [2021-06-05 14:34:24,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086126579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:24,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:24,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195676346] [2021-06-05 14:34:24,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:24,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:24,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:24,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:24,419 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:24,712 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-06-05 14:34:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:24,713 INFO L225 Difference]: With dead ends: 510 [2021-06-05 14:34:24,713 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:34:24,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:34:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-06-05 14:34:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.048076923076923) internal successors, (951), 312 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-06-05 14:34:24,717 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-06-05 14:34:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:24,717 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-06-05 14:34:24,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-06-05 14:34:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:24,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:24,718 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:24,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,918 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 346 times [2021-06-05 14:34:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:24,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890985335] [2021-06-05 14:34:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890985335] [2021-06-05 14:34:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890985335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136019270] [2021-06-05 14:34:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:25,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136019270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264975314] [2021-06-05 14:34:25,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:25,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:25,135 INFO L87 Difference]: Start difference. First operand 313 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:25,320 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-06-05 14:34:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:25,321 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:34:25,321 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:34:25,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:34:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-06-05 14:34:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 14:34:25,325 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 14:34:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:25,325 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 14:34:25,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 14:34:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:25,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:25,325 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:25,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:25,526 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 347 times [2021-06-05 14:34:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:25,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040051038] [2021-06-05 14:34:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:25,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040051038] [2021-06-05 14:34:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040051038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925261368] [2021-06-05 14:34:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:25,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:25,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925261368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:25,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:25,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522789751] [2021-06-05 14:34:25,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:25,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:25,755 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:25,940 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-06-05 14:34:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:25,941 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:34:25,941 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:34:25,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:34:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-06-05 14:34:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.045307443365696) internal successors, (941), 309 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-06-05 14:34:25,945 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-06-05 14:34:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:25,945 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-06-05 14:34:25,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-06-05 14:34:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:25,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:25,946 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:26,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3279 [2021-06-05 14:34:26,146 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 348 times [2021-06-05 14:34:26,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:26,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261162268] [2021-06-05 14:34:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261162268] [2021-06-05 14:34:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261162268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885201875] [2021-06-05 14:34:26,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:26,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885201875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:26,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88460198] [2021-06-05 14:34:26,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:26,372 INFO L87 Difference]: Start difference. First operand 310 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:26,589 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-06-05 14:34:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:26,590 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:34:26,590 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:34:26,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:34:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-06-05 14:34:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 14:34:26,594 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 14:34:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:26,594 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 14:34:26,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 14:34:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:26,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:26,594 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:26,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-06-05 14:34:26,795 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 349 times [2021-06-05 14:34:26,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:26,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713092977] [2021-06-05 14:34:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:26,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713092977] [2021-06-05 14:34:26,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713092977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919274730] [2021-06-05 14:34:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:27,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919274730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:27,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:27,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52306142] [2021-06-05 14:34:27,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:27,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:27,009 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:27,167 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-06-05 14:34:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:27,167 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:34:27,168 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:34:27,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:34:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-06-05 14:34:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.032258064516129) internal successors, (940), 310 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-06-05 14:34:27,171 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-06-05 14:34:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:27,171 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-06-05 14:34:27,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-06-05 14:34:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:27,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:27,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:27,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,372 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 350 times [2021-06-05 14:34:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:27,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368618933] [2021-06-05 14:34:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:27,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368618933] [2021-06-05 14:34:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368618933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300606356] [2021-06-05 14:34:27,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:27,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:27,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300606356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:27,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:27,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738527763] [2021-06-05 14:34:27,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:27,592 INFO L87 Difference]: Start difference. First operand 311 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:27,825 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-06-05 14:34:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:27,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:27,826 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:34:27,826 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:34:27,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:34:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-06-05 14:34:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 14:34:27,830 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 14:34:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:27,830 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 14:34:27,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 14:34:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:27,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:27,831 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:28,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,031 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 351 times [2021-06-05 14:34:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604299908] [2021-06-05 14:34:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604299908] [2021-06-05 14:34:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604299908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359525723] [2021-06-05 14:34:28,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:28,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359525723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:28,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:28,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292576686] [2021-06-05 14:34:28,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:28,250 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:28,453 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-06-05 14:34:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:28,454 INFO L225 Difference]: With dead ends: 429 [2021-06-05 14:34:28,454 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 14:34:28,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 14:34:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-06-05 14:34:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0387096774193547) internal successors, (942), 310 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-06-05 14:34:28,457 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-06-05 14:34:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:28,457 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-06-05 14:34:28,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-06-05 14:34:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:28,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:28,458 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:28,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,662 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 352 times [2021-06-05 14:34:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:28,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381853255] [2021-06-05 14:34:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381853255] [2021-06-05 14:34:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381853255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571816758] [2021-06-05 14:34:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571816758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:28,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:28,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58633626] [2021-06-05 14:34:28,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:28,890 INFO L87 Difference]: Start difference. First operand 311 states and 942 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:29,069 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-06-05 14:34:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:29,070 INFO L225 Difference]: With dead ends: 423 [2021-06-05 14:34:29,070 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:34:29,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:34:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-06-05 14:34:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.019543973941368) internal successors, (927), 307 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-06-05 14:34:29,073 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-06-05 14:34:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:29,073 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-06-05 14:34:29,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-06-05 14:34:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:29,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:29,074 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 14:34:29,274 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 353 times [2021-06-05 14:34:29,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245124956] [2021-06-05 14:34:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:29,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245124956] [2021-06-05 14:34:29,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245124956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813625332] [2021-06-05 14:34:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:29,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:29,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813625332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:29,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:29,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951946698] [2021-06-05 14:34:29,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:29,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:29,493 INFO L87 Difference]: Start difference. First operand 308 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:29,659 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-06-05 14:34:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:29,660 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:34:29,660 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:34:29,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:34:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-06-05 14:34:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 14:34:29,664 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 14:34:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:29,664 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 14:34:29,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 14:34:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:29,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:29,664 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,864 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 354 times [2021-06-05 14:34:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945625801] [2021-06-05 14:34:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:29,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945625801] [2021-06-05 14:34:29,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945625801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182113010] [2021-06-05 14:34:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:30,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182113010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:30,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220541615] [2021-06-05 14:34:30,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:30,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:30,081 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:30,228 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-06-05 14:34:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:30,229 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:34:30,229 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:34:30,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:34:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-06-05 14:34:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.016025641025641) internal successors, (941), 312 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-06-05 14:34:30,232 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-06-05 14:34:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:30,233 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-06-05 14:34:30,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-06-05 14:34:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:30,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:30,233 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:30,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-05 14:34:30,433 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 355 times [2021-06-05 14:34:30,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:30,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235941390] [2021-06-05 14:34:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:30,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:30,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235941390] [2021-06-05 14:34:30,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235941390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232514071] [2021-06-05 14:34:30,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:30,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232514071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:30,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782717196] [2021-06-05 14:34:30,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:30,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:30,647 INFO L87 Difference]: Start difference. First operand 313 states and 941 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:30,858 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-06-05 14:34:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:30,859 INFO L225 Difference]: With dead ends: 391 [2021-06-05 14:34:30,859 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:34:30,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:34:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-06-05 14:34:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.00974025974026) internal successors, (927), 308 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-06-05 14:34:30,862 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-06-05 14:34:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:30,862 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-06-05 14:34:30,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-06-05 14:34:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:30,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:30,863 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:31,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,063 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 356 times [2021-06-05 14:34:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:31,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828011087] [2021-06-05 14:34:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:31,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828011087] [2021-06-05 14:34:31,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828011087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697073406] [2021-06-05 14:34:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:31,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:31,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697073406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:31,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:31,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830470916] [2021-06-05 14:34:31,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:31,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:31,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:31,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:31,286 INFO L87 Difference]: Start difference. First operand 309 states and 927 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:31,454 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-06-05 14:34:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:31,455 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:34:31,455 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:34:31,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:34:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-06-05 14:34:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.00990099009901) internal successors, (912), 303 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-06-05 14:34:31,458 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-06-05 14:34:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:31,458 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-06-05 14:34:31,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-06-05 14:34:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:31,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:31,459 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:31,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,659 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 357 times [2021-06-05 14:34:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:31,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950467834] [2021-06-05 14:34:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:31,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:31,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950467834] [2021-06-05 14:34:31,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950467834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034507] [2021-06-05 14:34:31,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:31,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:31,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:31,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:31,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,829 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:31,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:31,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:31,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942009759] [2021-06-05 14:34:31,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:31,862 INFO L87 Difference]: Start difference. First operand 304 states and 912 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:32,014 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-06-05 14:34:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:32,015 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:34:32,015 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:34:32,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:34:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-06-05 14:34:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.006622516556291) internal successors, (908), 302 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-06-05 14:34:32,018 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-06-05 14:34:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:32,018 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-06-05 14:34:32,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-06-05 14:34:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:32,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:32,019 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:32,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,219 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 358 times [2021-06-05 14:34:32,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:32,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785902191] [2021-06-05 14:34:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:32,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:32,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785902191] [2021-06-05 14:34:32,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785902191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925141090] [2021-06-05 14:34:32,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:32,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:32,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:32,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,411 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:32,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:32,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925141090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:32,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:34:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066043623] [2021-06-05 14:34:32,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:34:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:34:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:34:32,440 INFO L87 Difference]: Start difference. First operand 303 states and 908 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:32,610 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-06-05 14:34:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:32,611 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:34:32,611 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:34:32,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:34:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-06-05 14:34:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0262295081967214) internal successors, (923), 305 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-06-05 14:34:32,615 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-06-05 14:34:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:32,615 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-06-05 14:34:32,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-06-05 14:34:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:32,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:32,615 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:32,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,816 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 359 times [2021-06-05 14:34:32,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:32,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359607417] [2021-06-05 14:34:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:32,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359607417] [2021-06-05 14:34:32,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359607417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291061808] [2021-06-05 14:34:32,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:32,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:32,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,995 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:34:32,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:32,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:34:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:33,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291061808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:33,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:34:33,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993430049] [2021-06-05 14:34:33,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:34:33,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:33,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:34:33,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:34:33,023 INFO L87 Difference]: Start difference. First operand 306 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:33,187 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-06-05 14:34:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:33,188 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:34:33,188 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:34:33,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:34:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 14:34:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9864864864864864) internal successors, (884), 296 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-06-05 14:34:33,191 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-06-05 14:34:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:33,191 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-06-05 14:34:33,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-06-05 14:34:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:33,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:33,192 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:33,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3360,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:33,405 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 360 times [2021-06-05 14:34:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:33,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785771970] [2021-06-05 14:34:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:33,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:33,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785771970] [2021-06-05 14:34:33,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785771970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804330446] [2021-06-05 14:34:33,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:33,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:33,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804330446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:33,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:33,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255999028] [2021-06-05 14:34:33,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:33,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:33,603 INFO L87 Difference]: Start difference. First operand 297 states and 884 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:33,771 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-06-05 14:34:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:33,772 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:34:33,772 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:34:33,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:34:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 14:34:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 14:34:33,775 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 14:34:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:33,775 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 14:34:33,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 14:34:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:33,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:33,776 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:33,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:33,976 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 361 times [2021-06-05 14:34:33,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904361863] [2021-06-05 14:34:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904361863] [2021-06-05 14:34:34,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904361863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885401734] [2021-06-05 14:34:34,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885401734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:34,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318612561] [2021-06-05 14:34:34,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:34,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:34,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:34,169 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:34,352 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-06-05 14:34:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:34,353 INFO L225 Difference]: With dead ends: 378 [2021-06-05 14:34:34,353 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:34:34,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:34:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-06-05 14:34:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9625850340136055) internal successors, (871), 294 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-06-05 14:34:34,356 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-06-05 14:34:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:34,356 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-06-05 14:34:34,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-06-05 14:34:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:34,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:34,357 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:34,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-06-05 14:34:34,557 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 362 times [2021-06-05 14:34:34,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:34,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307926570] [2021-06-05 14:34:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307926570] [2021-06-05 14:34:34,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307926570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076766757] [2021-06-05 14:34:34,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:34,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:34,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076766757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:34,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082324906] [2021-06-05 14:34:34,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:34,767 INFO L87 Difference]: Start difference. First operand 295 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:34,927 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 14:34:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:34,928 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:34:34,928 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:34:34,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:34:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-06-05 14:34:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9527272727272726) internal successors, (812), 275 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-06-05 14:34:34,930 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-06-05 14:34:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:34,930 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-06-05 14:34:34,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-06-05 14:34:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:34,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:34,931 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:35,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,131 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 363 times [2021-06-05 14:34:35,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:35,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206111771] [2021-06-05 14:34:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:35,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206111771] [2021-06-05 14:34:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206111771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472037420] [2021-06-05 14:34:35,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:35,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:35,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472037420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:35,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:35,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565755936] [2021-06-05 14:34:35,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:35,344 INFO L87 Difference]: Start difference. First operand 276 states and 812 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:35,513 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-06-05 14:34:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:35,514 INFO L225 Difference]: With dead ends: 406 [2021-06-05 14:34:35,514 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 14:34:35,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 14:34:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-06-05 14:34:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9964788732394365) internal successors, (851), 284 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-06-05 14:34:35,517 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-06-05 14:34:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:35,517 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-06-05 14:34:35,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-06-05 14:34:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:35,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:35,518 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:35,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 14:34:35,718 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 364 times [2021-06-05 14:34:35,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:35,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969060653] [2021-06-05 14:34:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969060653] [2021-06-05 14:34:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969060653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283690307] [2021-06-05 14:34:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:35,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283690307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:35,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:35,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675940987] [2021-06-05 14:34:35,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:35,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:35,936 INFO L87 Difference]: Start difference. First operand 285 states and 851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:36,161 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-06-05 14:34:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:36,162 INFO L225 Difference]: With dead ends: 412 [2021-06-05 14:34:36,162 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 14:34:36,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 14:34:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-06-05 14:34:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9750889679715304) internal successors, (836), 281 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-06-05 14:34:36,165 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-06-05 14:34:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:36,165 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-06-05 14:34:36,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-06-05 14:34:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:36,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:36,165 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:36,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:36,366 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:36,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 365 times [2021-06-05 14:34:36,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:36,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886272936] [2021-06-05 14:34:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:36,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:36,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886272936] [2021-06-05 14:34:36,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886272936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425727535] [2021-06-05 14:34:36,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:36,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425727535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704673100] [2021-06-05 14:34:36,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:36,562 INFO L87 Difference]: Start difference. First operand 282 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:36,731 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-06-05 14:34:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:36,731 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:34:36,731 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:34:36,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:34:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 14:34:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.964028776978417) internal successors, (824), 278 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-06-05 14:34:36,735 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-06-05 14:34:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:36,735 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-06-05 14:34:36,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-06-05 14:34:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:36,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:36,735 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:36,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-06-05 14:34:36,936 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 366 times [2021-06-05 14:34:36,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:36,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328922080] [2021-06-05 14:34:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:37,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328922080] [2021-06-05 14:34:37,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328922080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816268578] [2021-06-05 14:34:37,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:37,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816268578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:37,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:34:37,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296924773] [2021-06-05 14:34:37,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:34:37,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:34:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:34:37,132 INFO L87 Difference]: Start difference. First operand 279 states and 824 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:37,305 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-06-05 14:34:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:37,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:37,305 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:34:37,305 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:34:37,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:34:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-06-05 14:34:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.954225352112676) internal successors, (839), 284 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-06-05 14:34:37,308 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-06-05 14:34:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:37,309 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-06-05 14:34:37,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-06-05 14:34:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:37,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:37,309 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:37,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 14:34:37,509 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 367 times [2021-06-05 14:34:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:37,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480814537] [2021-06-05 14:34:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:37,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480814537] [2021-06-05 14:34:37,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480814537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826930824] [2021-06-05 14:34:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826930824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:37,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:37,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246471736] [2021-06-05 14:34:37,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:37,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:37,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:37,736 INFO L87 Difference]: Start difference. First operand 285 states and 839 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:37,956 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2021-06-05 14:34:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:37,957 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:34:37,957 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 14:34:37,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 14:34:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2021-06-05 14:34:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.016891891891892) internal successors, (893), 296 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-06-05 14:34:37,961 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-06-05 14:34:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:37,961 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-06-05 14:34:37,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-06-05 14:34:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:37,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:37,961 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:38,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,161 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 368 times [2021-06-05 14:34:38,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:38,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810099889] [2021-06-05 14:34:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810099889] [2021-06-05 14:34:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810099889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87001365] [2021-06-05 14:34:38,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87001365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:38,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105905382] [2021-06-05 14:34:38,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:38,383 INFO L87 Difference]: Start difference. First operand 297 states and 893 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:38,586 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-06-05 14:34:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:38,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:38,587 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:34:38,587 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 14:34:38,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 14:34:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-06-05 14:34:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 14:34:38,591 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 14:34:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:38,591 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 14:34:38,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 14:34:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:38,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:38,591 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-06-05 14:34:38,792 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:38,792 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 369 times [2021-06-05 14:34:38,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:38,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864120823] [2021-06-05 14:34:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:38,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:38,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864120823] [2021-06-05 14:34:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864120823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:38,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327502789] [2021-06-05 14:34:38,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:38,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:38,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327502789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:39,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:39,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299249985] [2021-06-05 14:34:39,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:39,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:39,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:39,034 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:39,423 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-06-05 14:34:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:39,424 INFO L225 Difference]: With dead ends: 582 [2021-06-05 14:34:39,424 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 14:34:39,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 14:34:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-06-05 14:34:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 14:34:39,428 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 14:34:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 14:34:39,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 14:34:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:39,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:39,428 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:39,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:39,629 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 370 times [2021-06-05 14:34:39,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:39,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059021073] [2021-06-05 14:34:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059021073] [2021-06-05 14:34:39,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059021073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292223862] [2021-06-05 14:34:39,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:39,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:39,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292223862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:39,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:39,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122071600] [2021-06-05 14:34:39,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:39,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:39,859 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:40,241 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-06-05 14:34:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:40,242 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:34:40,242 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 14:34:40,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 14:34:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-06-05 14:34:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 14:34:40,247 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 14:34:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:40,248 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 14:34:40,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 14:34:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:40,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:40,248 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:40,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-06-05 14:34:40,448 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 371 times [2021-06-05 14:34:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269008140] [2021-06-05 14:34:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:40,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269008140] [2021-06-05 14:34:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269008140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620091065] [2021-06-05 14:34:40,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:40,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620091065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706288834] [2021-06-05 14:34:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:40,668 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:41,016 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-06-05 14:34:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:41,017 INFO L225 Difference]: With dead ends: 548 [2021-06-05 14:34:41,017 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:34:41,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:34:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-06-05 14:34:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-06-05 14:34:41,021 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-06-05 14:34:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:41,021 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-06-05 14:34:41,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-06-05 14:34:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:41,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:41,022 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:41,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:41,222 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 372 times [2021-06-05 14:34:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:41,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690464140] [2021-06-05 14:34:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:41,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690464140] [2021-06-05 14:34:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690464140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231249632] [2021-06-05 14:34:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:41,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:41,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231249632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:41,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:41,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:41,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95192738] [2021-06-05 14:34:41,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:41,448 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:41,827 INFO L93 Difference]: Finished difference Result 531 states and 1517 transitions. [2021-06-05 14:34:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:41,828 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:34:41,828 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:34:41,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:34:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-06-05 14:34:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 14:34:41,832 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 14:34:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:41,832 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 14:34:41,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 14:34:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:41,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:41,833 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:42,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,033 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 373 times [2021-06-05 14:34:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:42,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200960855] [2021-06-05 14:34:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:42,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200960855] [2021-06-05 14:34:42,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200960855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205716328] [2021-06-05 14:34:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205716328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:42,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:42,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190694007] [2021-06-05 14:34:42,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:42,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:42,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:42,265 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:42,495 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-06-05 14:34:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:42,495 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:34:42,495 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:34:42,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:34:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-06-05 14:34:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 14:34:42,499 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 14:34:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:42,499 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 14:34:42,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 14:34:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:42,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:42,500 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:42,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-05 14:34:42,700 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:42,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:42,700 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 374 times [2021-06-05 14:34:42,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:42,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105324190] [2021-06-05 14:34:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:42,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105324190] [2021-06-05 14:34:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105324190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314036735] [2021-06-05 14:34:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:42,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:42,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314036735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:42,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:42,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938251280] [2021-06-05 14:34:42,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:42,943 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:43,243 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-06-05 14:34:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:43,243 INFO L225 Difference]: With dead ends: 502 [2021-06-05 14:34:43,244 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:34:43,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:34:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-06-05 14:34:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-06-05 14:34:43,247 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-06-05 14:34:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:43,247 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-06-05 14:34:43,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-06-05 14:34:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:43,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:43,248 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:43,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,448 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 375 times [2021-06-05 14:34:43,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:43,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656020948] [2021-06-05 14:34:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:43,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656020948] [2021-06-05 14:34:43,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656020948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537349654] [2021-06-05 14:34:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537349654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:43,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:43,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384427726] [2021-06-05 14:34:43,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:43,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:43,675 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:43,936 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-06-05 14:34:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:43,937 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:34:43,937 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:34:43,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:34:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-06-05 14:34:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 14:34:43,941 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 14:34:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:43,941 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 14:34:43,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 14:34:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:43,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:43,941 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:44,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,141 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 376 times [2021-06-05 14:34:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:44,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336033372] [2021-06-05 14:34:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:44,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336033372] [2021-06-05 14:34:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336033372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722639023] [2021-06-05 14:34:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722639023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:44,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:44,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107282048] [2021-06-05 14:34:44,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:44,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:44,368 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:44,580 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-06-05 14:34:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:44,581 INFO L225 Difference]: With dead ends: 478 [2021-06-05 14:34:44,581 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:34:44,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:34:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-06-05 14:34:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 14:34:44,593 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 14:34:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:44,593 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 14:34:44,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 14:34:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:44,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:44,594 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:44,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,794 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 377 times [2021-06-05 14:34:44,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:44,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613885533] [2021-06-05 14:34:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:44,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:44,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613885533] [2021-06-05 14:34:44,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613885533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422999466] [2021-06-05 14:34:44,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:44,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422999466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:45,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908927081] [2021-06-05 14:34:45,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:45,021 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:45,326 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-06-05 14:34:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:45,327 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:34:45,327 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:34:45,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:34:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-06-05 14:34:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 14:34:45,330 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 14:34:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:45,331 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 14:34:45,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 14:34:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:45,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:45,331 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,533 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 378 times [2021-06-05 14:34:45,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:45,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788344326] [2021-06-05 14:34:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788344326] [2021-06-05 14:34:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788344326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041730658] [2021-06-05 14:34:45,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041730658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:45,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:45,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543786202] [2021-06-05 14:34:45,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:45,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:45,757 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:45,980 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-06-05 14:34:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:45,981 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:34:45,981 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 14:34:45,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 14:34:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-06-05 14:34:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9966777408637872) internal successors, (902), 301 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-06-05 14:34:45,985 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-06-05 14:34:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:45,985 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-06-05 14:34:45,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-06-05 14:34:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:45,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:45,985 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:46,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-05 14:34:46,185 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 379 times [2021-06-05 14:34:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:46,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964192087] [2021-06-05 14:34:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:46,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964192087] [2021-06-05 14:34:46,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964192087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532628054] [2021-06-05 14:34:46,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532628054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:46,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:46,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358899518] [2021-06-05 14:34:46,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:46,407 INFO L87 Difference]: Start difference. First operand 302 states and 902 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:46,649 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-06-05 14:34:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:46,650 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:34:46,650 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:34:46,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:34:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-06-05 14:34:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 14:34:46,654 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 14:34:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:46,654 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 14:34:46,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 14:34:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:46,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:46,655 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:46,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3490,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,855 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 380 times [2021-06-05 14:34:46,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:46,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342785413] [2021-06-05 14:34:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:46,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342785413] [2021-06-05 14:34:46,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342785413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190259297] [2021-06-05 14:34:46,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:46,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190259297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:47,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:47,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126504613] [2021-06-05 14:34:47,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:47,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:47,078 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:47,379 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-06-05 14:34:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:47,380 INFO L225 Difference]: With dead ends: 558 [2021-06-05 14:34:47,380 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 14:34:47,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 14:34:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-06-05 14:34:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9767441860465116) internal successors, (896), 301 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-06-05 14:34:47,384 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-06-05 14:34:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:47,384 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-06-05 14:34:47,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-06-05 14:34:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:47,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:47,385 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:47,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3496 [2021-06-05 14:34:47,586 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 381 times [2021-06-05 14:34:47,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:47,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533409324] [2021-06-05 14:34:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:47,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:47,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533409324] [2021-06-05 14:34:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533409324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441178974] [2021-06-05 14:34:47,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:47,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441178974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:47,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:34:47,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084826237] [2021-06-05 14:34:47,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:34:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:34:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:34:47,811 INFO L87 Difference]: Start difference. First operand 302 states and 896 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:48,027 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-06-05 14:34:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:48,029 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:34:48,029 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:34:48,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:34:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-06-05 14:34:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.96875) internal successors, (855), 288 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-06-05 14:34:48,032 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-06-05 14:34:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:48,032 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-06-05 14:34:48,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-06-05 14:34:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:48,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:48,033 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:48,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:48,234 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 382 times [2021-06-05 14:34:48,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:48,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311187931] [2021-06-05 14:34:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311187931] [2021-06-05 14:34:48,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311187931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228248862] [2021-06-05 14:34:48,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:48,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228248862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:48,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:48,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052390160] [2021-06-05 14:34:48,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:48,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:48,438 INFO L87 Difference]: Start difference. First operand 289 states and 855 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:48,655 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-06-05 14:34:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:48,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:48,656 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:34:48,656 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:34:48,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:34:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-06-05 14:34:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.957894736842105) internal successors, (843), 285 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-06-05 14:34:48,659 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-06-05 14:34:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-06-05 14:34:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-06-05 14:34:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:48,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:48,660 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:48,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3506,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:48,873 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 383 times [2021-06-05 14:34:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724431107] [2021-06-05 14:34:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724431107] [2021-06-05 14:34:48,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724431107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598717459] [2021-06-05 14:34:48,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598717459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:49,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:49,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839106790] [2021-06-05 14:34:49,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:49,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:49,093 INFO L87 Difference]: Start difference. First operand 286 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:49,301 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-06-05 14:34:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:49,302 INFO L225 Difference]: With dead ends: 442 [2021-06-05 14:34:49,302 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:34:49,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:34:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-06-05 14:34:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9504950495049505) internal successors, (894), 303 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-06-05 14:34:49,305 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-06-05 14:34:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:49,305 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-06-05 14:34:49,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-06-05 14:34:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:49,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:49,306 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:49,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,506 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 384 times [2021-06-05 14:34:49,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:49,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225917874] [2021-06-05 14:34:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225917874] [2021-06-05 14:34:49,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225917874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775237549] [2021-06-05 14:34:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775237549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:49,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:49,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495714003] [2021-06-05 14:34:49,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:49,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:49,709 INFO L87 Difference]: Start difference. First operand 304 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:49,980 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-06-05 14:34:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:49,981 INFO L225 Difference]: With dead ends: 448 [2021-06-05 14:34:49,981 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 14:34:49,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 14:34:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-06-05 14:34:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.953488372093023) internal successors, (889), 301 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-06-05 14:34:49,985 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-06-05 14:34:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:49,985 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-06-05 14:34:49,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-06-05 14:34:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:49,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:49,985 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:50,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:50,186 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 385 times [2021-06-05 14:34:50,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:50,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761595415] [2021-06-05 14:34:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:50,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761595415] [2021-06-05 14:34:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761595415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846288478] [2021-06-05 14:34:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:50,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:50,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846288478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:50,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:34:50,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245544864] [2021-06-05 14:34:50,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:34:50,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:34:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:34:50,391 INFO L87 Difference]: Start difference. First operand 302 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:50,608 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-06-05 14:34:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:50,609 INFO L225 Difference]: With dead ends: 431 [2021-06-05 14:34:50,609 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:34:50,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:34:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-06-05 14:34:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9565217391304346) internal successors, (884), 299 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-06-05 14:34:50,612 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-06-05 14:34:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:50,613 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-06-05 14:34:50,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-06-05 14:34:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:50,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:50,613 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:50,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-06-05 14:34:50,813 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 386 times [2021-06-05 14:34:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:50,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484581165] [2021-06-05 14:34:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:50,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:50,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484581165] [2021-06-05 14:34:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484581165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286698621] [2021-06-05 14:34:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:50,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:50,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286698621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:50,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:34:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476899000] [2021-06-05 14:34:50,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:34:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:34:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:34:50,995 INFO L87 Difference]: Start difference. First operand 300 states and 884 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:51,205 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-06-05 14:34:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:51,206 INFO L225 Difference]: With dead ends: 456 [2021-06-05 14:34:51,206 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:34:51,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:34:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-06-05 14:34:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.9547038327526134) internal successors, (848), 287 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-06-05 14:34:51,210 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-06-05 14:34:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:51,210 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-06-05 14:34:51,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-06-05 14:34:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:51,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:51,210 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:51,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,411 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 387 times [2021-06-05 14:34:51,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892383435] [2021-06-05 14:34:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:51,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892383435] [2021-06-05 14:34:51,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892383435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563737610] [2021-06-05 14:34:51,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:51,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563737610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:51,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596594912] [2021-06-05 14:34:51,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:51,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:51,688 INFO L87 Difference]: Start difference. First operand 288 states and 848 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:52,013 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-06-05 14:34:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:52,013 INFO L225 Difference]: With dead ends: 369 [2021-06-05 14:34:52,013 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:34:52,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:34:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-06-05 14:34:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.983108108108108) internal successors, (883), 296 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-06-05 14:34:52,016 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-06-05 14:34:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:52,017 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-06-05 14:34:52,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-06-05 14:34:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:52,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:52,017 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:52,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-06-05 14:34:52,217 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 388 times [2021-06-05 14:34:52,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:52,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991708708] [2021-06-05 14:34:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:52,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:52,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991708708] [2021-06-05 14:34:52,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991708708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16017217] [2021-06-05 14:34:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:52,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16017217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:52,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:52,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207231323] [2021-06-05 14:34:52,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:52,481 INFO L87 Difference]: Start difference. First operand 297 states and 883 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:52,768 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-06-05 14:34:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:52,769 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:34:52,769 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:34:52,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:34:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-06-05 14:34:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 14:34:52,772 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 14:34:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:52,772 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 14:34:52,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 14:34:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:52,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:52,772 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:52,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,973 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 389 times [2021-06-05 14:34:52,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:52,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81301383] [2021-06-05 14:34:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:53,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:53,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81301383] [2021-06-05 14:34:53,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81301383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413194544] [2021-06-05 14:34:53,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:53,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:53,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:53,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:53,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413194544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:53,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:53,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029962596] [2021-06-05 14:34:53,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:53,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:53,238 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:53,587 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-06-05 14:34:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:53,588 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:34:53,588 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:34:53,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:34:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-06-05 14:34:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 14:34:53,591 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 14:34:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:53,591 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 14:34:53,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 14:34:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:53,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:53,591 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:53,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 14:34:53,791 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 390 times [2021-06-05 14:34:53,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:53,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502675210] [2021-06-05 14:34:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:53,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502675210] [2021-06-05 14:34:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502675210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77667132] [2021-06-05 14:34:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:53,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77667132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:54,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:54,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795692301] [2021-06-05 14:34:54,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:54,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:54,055 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:54,322 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-06-05 14:34:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:54,323 INFO L225 Difference]: With dead ends: 456 [2021-06-05 14:34:54,323 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:34:54,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:34:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-06-05 14:34:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.01006711409396) internal successors, (897), 298 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-06-05 14:34:54,327 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-06-05 14:34:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:54,327 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-06-05 14:34:54,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-06-05 14:34:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:54,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:54,327 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:54,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 14:34:54,528 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 391 times [2021-06-05 14:34:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:54,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101756875] [2021-06-05 14:34:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101756875] [2021-06-05 14:34:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101756875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105256283] [2021-06-05 14:34:54,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:54,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105256283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:54,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:54,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757124830] [2021-06-05 14:34:54,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:54,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:54,792 INFO L87 Difference]: Start difference. First operand 299 states and 897 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:55,060 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-06-05 14:34:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:55,061 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:34:55,061 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:34:55,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:34:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-06-05 14:34:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 14:34:55,064 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 14:34:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:55,064 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 14:34:55,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 14:34:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:55,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:55,065 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:55,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,265 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:55,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 392 times [2021-06-05 14:34:55,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829282240] [2021-06-05 14:34:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829282240] [2021-06-05 14:34:55,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829282240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125845488] [2021-06-05 14:34:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:55,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125845488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:55,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:55,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119999288] [2021-06-05 14:34:55,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:55,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:55,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:55,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:55,553 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:55,771 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-06-05 14:34:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:55,772 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:34:55,772 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:34:55,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:34:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-06-05 14:34:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.996598639455782) internal successors, (881), 294 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-06-05 14:34:55,775 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-06-05 14:34:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:55,775 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-06-05 14:34:55,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-06-05 14:34:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:55,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:55,776 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:55,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,976 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 393 times [2021-06-05 14:34:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:55,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742623062] [2021-06-05 14:34:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:56,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742623062] [2021-06-05 14:34:56,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742623062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768644921] [2021-06-05 14:34:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:56,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768644921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:56,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988372092] [2021-06-05 14:34:56,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:56,243 INFO L87 Difference]: Start difference. First operand 295 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:56,510 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-06-05 14:34:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:56,511 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:34:56,511 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:34:56,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:34:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-06-05 14:34:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9759450171821307) internal successors, (866), 291 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-06-05 14:34:56,514 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-06-05 14:34:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:56,514 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-06-05 14:34:56,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-06-05 14:34:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:56,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:56,515 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:56,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,715 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 394 times [2021-06-05 14:34:56,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:56,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848728952] [2021-06-05 14:34:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:56,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848728952] [2021-06-05 14:34:56,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848728952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194151937] [2021-06-05 14:34:56,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194151937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:56,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:56,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12704868] [2021-06-05 14:34:56,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:56,980 INFO L87 Difference]: Start difference. First operand 292 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:57,213 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-06-05 14:34:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:57,213 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:34:57,213 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:34:57,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:34:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-06-05 14:34:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9667774086378738) internal successors, (893), 301 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-06-05 14:34:57,217 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-06-05 14:34:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:57,217 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-06-05 14:34:57,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-06-05 14:34:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:57,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:57,217 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:57,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 14:34:57,418 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 395 times [2021-06-05 14:34:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699389896] [2021-06-05 14:34:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:57,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699389896] [2021-06-05 14:34:57,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699389896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823599201] [2021-06-05 14:34:57,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:57,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:57,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823599201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:57,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:57,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363687698] [2021-06-05 14:34:57,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:57,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:57,692 INFO L87 Difference]: Start difference. First operand 302 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:57,977 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-06-05 14:34:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:57,978 INFO L225 Difference]: With dead ends: 401 [2021-06-05 14:34:57,978 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:34:57,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:34:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-06-05 14:34:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 14:34:57,981 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 14:34:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:57,981 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 14:34:57,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 14:34:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:57,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:57,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:58,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,182 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 396 times [2021-06-05 14:34:58,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:58,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153753418] [2021-06-05 14:34:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:58,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153753418] [2021-06-05 14:34:58,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153753418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234411247] [2021-06-05 14:34:58,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:58,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234411247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:58,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160029289] [2021-06-05 14:34:58,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:58,453 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:58,821 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-06-05 14:34:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:58,821 INFO L225 Difference]: With dead ends: 341 [2021-06-05 14:34:58,821 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:34:58,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:34:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-06-05 14:34:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9657534246575343) internal successors, (866), 292 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-06-05 14:34:58,824 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-06-05 14:34:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:58,825 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-06-05 14:34:58,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-06-05 14:34:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:58,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:58,825 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:59,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-06-05 14:34:59,025 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 397 times [2021-06-05 14:34:59,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:59,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046640576] [2021-06-05 14:34:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:59,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046640576] [2021-06-05 14:34:59,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046640576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999806099] [2021-06-05 14:34:59,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:34:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999806099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:59,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:34:59,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678246499] [2021-06-05 14:34:59,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:59,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:59,331 INFO L87 Difference]: Start difference. First operand 293 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:59,687 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-06-05 14:34:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:34:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:59,688 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:34:59,688 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:34:59,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:34:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-06-05 14:34:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.956953642384106) internal successors, (893), 302 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-06-05 14:34:59,691 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-06-05 14:34:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:59,691 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-06-05 14:34:59,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-06-05 14:34:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:34:59,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:59,691 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:59,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,892 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 398 times [2021-06-05 14:34:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:59,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850981173] [2021-06-05 14:34:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850981173] [2021-06-05 14:34:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850981173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569756330] [2021-06-05 14:34:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:00,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569756330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820048340] [2021-06-05 14:35:00,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:00,164 INFO L87 Difference]: Start difference. First operand 303 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:00,453 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-06-05 14:35:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:00,454 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:35:00,454 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:35:00,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:35:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-06-05 14:35:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 14:35:00,457 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 14:35:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:00,457 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 14:35:00,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 14:35:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:00,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:00,457 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:00,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:00,657 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 399 times [2021-06-05 14:35:00,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:00,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138716048] [2021-06-05 14:35:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:00,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:00,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138716048] [2021-06-05 14:35:00,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138716048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374191001] [2021-06-05 14:35:00,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:00,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374191001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:00,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027438248] [2021-06-05 14:35:00,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:00,922 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:01,139 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2021-06-05 14:35:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:01,140 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:35:01,140 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:35:01,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:35:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2021-06-05 14:35:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.0133779264214047) internal successors, (901), 299 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-06-05 14:35:01,143 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-06-05 14:35:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:01,143 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-06-05 14:35:01,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-06-05 14:35:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:01,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:01,144 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:01,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,344 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 400 times [2021-06-05 14:35:01,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:01,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415077041] [2021-06-05 14:35:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:01,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:01,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415077041] [2021-06-05 14:35:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415077041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821195465] [2021-06-05 14:35:01,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:01,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821195465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:01,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:01,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919482141] [2021-06-05 14:35:01,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:01,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:01,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:01,638 INFO L87 Difference]: Start difference. First operand 300 states and 901 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:01,845 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-06-05 14:35:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:01,845 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:35:01,845 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:35:01,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:35:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-06-05 14:35:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 14:35:01,849 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 14:35:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 14:35:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 14:35:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:01,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:01,849 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:02,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:02,050 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 401 times [2021-06-05 14:35:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944415739] [2021-06-05 14:35:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:02,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944415739] [2021-06-05 14:35:02,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944415739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276507620] [2021-06-05 14:35:02,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:02,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276507620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:02,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198450176] [2021-06-05 14:35:02,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:02,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:02,398 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:02,690 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-06-05 14:35:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:02,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:02,690 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:35:02,690 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:35:02,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:35:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-06-05 14:35:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0098360655737704) internal successors, (918), 305 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-06-05 14:35:02,694 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-06-05 14:35:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:02,694 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-06-05 14:35:02,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-06-05 14:35:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:02,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:02,695 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:02,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-06-05 14:35:02,895 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 402 times [2021-06-05 14:35:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:02,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436436395] [2021-06-05 14:35:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:02,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436436395] [2021-06-05 14:35:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436436395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086687272] [2021-06-05 14:35:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:03,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:03,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086687272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:03,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891219853] [2021-06-05 14:35:03,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:03,148 INFO L87 Difference]: Start difference. First operand 306 states and 918 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:03,452 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-06-05 14:35:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:03,453 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:35:03,453 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:35:03,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:35:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-06-05 14:35:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 14:35:03,457 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 14:35:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:03,457 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 14:35:03,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 14:35:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:03,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:03,458 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:03,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-06-05 14:35:03,661 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 403 times [2021-06-05 14:35:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132628205] [2021-06-05 14:35:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:03,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132628205] [2021-06-05 14:35:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132628205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587921225] [2021-06-05 14:35:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587921225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:03,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736322113] [2021-06-05 14:35:03,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:03,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:03,977 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:04,266 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-06-05 14:35:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:04,267 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:35:04,267 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:35:04,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:35:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-06-05 14:35:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.996732026143791) internal successors, (917), 306 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-06-05 14:35:04,271 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-06-05 14:35:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:04,271 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-06-05 14:35:04,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-06-05 14:35:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:04,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:04,271 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:04,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 14:35:04,475 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 404 times [2021-06-05 14:35:04,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:04,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025038034] [2021-06-05 14:35:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:04,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:04,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025038034] [2021-06-05 14:35:04,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025038034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:04,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313728824] [2021-06-05 14:35:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:04,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:04,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:04,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313728824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:04,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:04,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:04,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897859207] [2021-06-05 14:35:04,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:04,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:04,741 INFO L87 Difference]: Start difference. First operand 307 states and 917 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:04,993 INFO L93 Difference]: Finished difference Result 443 states and 1266 transitions. [2021-06-05 14:35:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:04,994 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:35:04,994 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:35:04,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:35:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-06-05 14:35:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9933993399339935) internal successors, (907), 303 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-06-05 14:35:04,998 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-06-05 14:35:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:04,998 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-06-05 14:35:04,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-06-05 14:35:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:04,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:04,998 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:05,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 14:35:05,199 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 405 times [2021-06-05 14:35:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:05,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333651176] [2021-06-05 14:35:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333651176] [2021-06-05 14:35:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333651176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426940252] [2021-06-05 14:35:05,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:05,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426940252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:05,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483501622] [2021-06-05 14:35:05,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:05,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:05,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:05,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:05,464 INFO L87 Difference]: Start difference. First operand 304 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:05,656 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-06-05 14:35:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:05,657 INFO L225 Difference]: With dead ends: 396 [2021-06-05 14:35:05,657 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 14:35:05,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 14:35:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-06-05 14:35:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9901315789473686) internal successors, (909), 304 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-06-05 14:35:05,660 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-06-05 14:35:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:05,660 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-06-05 14:35:05,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-06-05 14:35:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:05,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:05,661 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:05,861 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 406 times [2021-06-05 14:35:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:05,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082237633] [2021-06-05 14:35:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:05,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082237633] [2021-06-05 14:35:05,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082237633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178770696] [2021-06-05 14:35:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:06,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178770696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:06,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:06,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420965484] [2021-06-05 14:35:06,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:06,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:06,159 INFO L87 Difference]: Start difference. First operand 305 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:06,386 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-06-05 14:35:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:06,387 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:35:06,387 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:35:06,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:35:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-06-05 14:35:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 14:35:06,390 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 14:35:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:06,390 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 14:35:06,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 14:35:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:06,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:06,391 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:06,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 14:35:06,591 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 407 times [2021-06-05 14:35:06,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:06,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733406096] [2021-06-05 14:35:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:06,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733406096] [2021-06-05 14:35:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733406096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472033878] [2021-06-05 14:35:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:06,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472033878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:06,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090786475] [2021-06-05 14:35:06,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:06,838 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:07,017 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 14:35:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:07,018 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:35:07,018 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:35:07,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:35:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-06-05 14:35:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-06-05 14:35:07,021 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-06-05 14:35:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:07,021 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-06-05 14:35:07,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-06-05 14:35:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:07,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:07,021 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:07,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3719 [2021-06-05 14:35:07,222 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 408 times [2021-06-05 14:35:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:07,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349804247] [2021-06-05 14:35:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:07,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:07,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349804247] [2021-06-05 14:35:07,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349804247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295019215] [2021-06-05 14:35:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:07,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:07,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:07,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295019215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:07,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:07,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091702235] [2021-06-05 14:35:07,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:07,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:07,473 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:07,683 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-06-05 14:35:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:07,683 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:35:07,683 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:35:07,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:35:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-06-05 14:35:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9572368421052633) internal successors, (899), 304 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-06-05 14:35:07,687 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-06-05 14:35:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:07,687 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-06-05 14:35:07,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-06-05 14:35:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:07,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:07,687 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:07,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:07,888 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 409 times [2021-06-05 14:35:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:07,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044136975] [2021-06-05 14:35:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:07,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:07,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044136975] [2021-06-05 14:35:07,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044136975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484306256] [2021-06-05 14:35:07,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484306256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:08,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:08,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642890807] [2021-06-05 14:35:08,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:08,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:08,136 INFO L87 Difference]: Start difference. First operand 305 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:08,384 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-06-05 14:35:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:08,385 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:35:08,385 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 14:35:08,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 14:35:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-06-05 14:35:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9602649006622515) internal successors, (894), 302 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-06-05 14:35:08,388 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-06-05 14:35:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:08,388 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-06-05 14:35:08,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-06-05 14:35:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:08,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:08,389 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:08,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-06-05 14:35:08,589 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 410 times [2021-06-05 14:35:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:08,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175194717] [2021-06-05 14:35:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175194717] [2021-06-05 14:35:08,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175194717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91240580] [2021-06-05 14:35:08,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:08,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:08,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91240580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643123749] [2021-06-05 14:35:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:08,848 INFO L87 Difference]: Start difference. First operand 303 states and 894 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:09,053 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-06-05 14:35:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:09,053 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:35:09,053 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:35:09,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:35:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-06-05 14:35:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 14:35:09,056 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 14:35:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 14:35:09,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 14:35:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:09,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:09,057 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:09,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:09,257 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 411 times [2021-06-05 14:35:09,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:09,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152231822] [2021-06-05 14:35:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152231822] [2021-06-05 14:35:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152231822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663747786] [2021-06-05 14:35:09,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:09,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:09,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:09,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663747786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081994136] [2021-06-05 14:35:09,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:09,488 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:09,746 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-06-05 14:35:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:09,747 INFO L225 Difference]: With dead ends: 331 [2021-06-05 14:35:09,747 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 14:35:09,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 14:35:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-06-05 14:35:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 14:35:09,750 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 14:35:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:09,750 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 14:35:09,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 14:35:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:09,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:09,750 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:09,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3753 [2021-06-05 14:35:09,951 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 412 times [2021-06-05 14:35:09,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:09,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053864600] [2021-06-05 14:35:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:09,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053864600] [2021-06-05 14:35:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053864600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878946767] [2021-06-05 14:35:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:10,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:10,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878946767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:10,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:10,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531826886] [2021-06-05 14:35:10,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:10,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:10,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:10,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:10,189 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:10,444 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-06-05 14:35:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:10,445 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:35:10,445 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 14:35:10,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 14:35:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-06-05 14:35:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.947194719471947) internal successors, (893), 303 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-06-05 14:35:10,448 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-06-05 14:35:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:10,448 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-06-05 14:35:10,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-06-05 14:35:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:10,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:10,449 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:10,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-06-05 14:35:10,649 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 413 times [2021-06-05 14:35:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:10,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934307339] [2021-06-05 14:35:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:10,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934307339] [2021-06-05 14:35:10,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934307339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125203653] [2021-06-05 14:35:10,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:10,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:10,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125203653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:10,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774696217] [2021-06-05 14:35:10,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:10,886 INFO L87 Difference]: Start difference. First operand 304 states and 893 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:11,110 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 14:35:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:11,111 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:35:11,111 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:35:11,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:35:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-06-05 14:35:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 14:35:11,114 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 14:35:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:11,114 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 14:35:11,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 14:35:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:11,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:11,114 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:11,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:11,315 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 414 times [2021-06-05 14:35:11,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:11,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431104270] [2021-06-05 14:35:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:11,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:11,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431104270] [2021-06-05 14:35:11,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431104270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655687460] [2021-06-05 14:35:11,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:11,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655687460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:11,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107422340] [2021-06-05 14:35:11,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:11,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:11,552 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:11,712 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-06-05 14:35:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:11,713 INFO L225 Difference]: With dead ends: 362 [2021-06-05 14:35:11,713 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 14:35:11,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 14:35:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-06-05 14:35:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9508196721311477) internal successors, (900), 305 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-06-05 14:35:11,716 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-06-05 14:35:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:11,716 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-06-05 14:35:11,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-06-05 14:35:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:11,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:11,717 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:11,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:11,917 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 415 times [2021-06-05 14:35:11,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:11,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177625717] [2021-06-05 14:35:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:11,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:11,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177625717] [2021-06-05 14:35:11,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177625717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043972898] [2021-06-05 14:35:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:12,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043972898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:12,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:12,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267914415] [2021-06-05 14:35:12,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:12,137 INFO L87 Difference]: Start difference. First operand 306 states and 900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:12,313 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-06-05 14:35:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:12,314 INFO L225 Difference]: With dead ends: 362 [2021-06-05 14:35:12,314 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 14:35:12,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 14:35:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-06-05 14:35:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 14:35:12,318 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-06-05 14:35:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:12,318 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 14:35:12,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 14:35:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:12,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:12,318 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:12,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:12,519 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 416 times [2021-06-05 14:35:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:12,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513041602] [2021-06-05 14:35:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:12,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513041602] [2021-06-05 14:35:12,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513041602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475835096] [2021-06-05 14:35:12,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:12,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:12,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:12,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:12,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475835096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:12,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:12,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137854088] [2021-06-05 14:35:12,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:12,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:12,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:12,741 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:12,924 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-06-05 14:35:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:12,925 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:35:12,925 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:35:12,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:35:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-06-05 14:35:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 14:35:12,928 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 14:35:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:12,928 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 14:35:12,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 14:35:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:12,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:12,928 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:13,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-05 14:35:13,129 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 417 times [2021-06-05 14:35:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:13,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569169730] [2021-06-05 14:35:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:13,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:13,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569169730] [2021-06-05 14:35:13,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569169730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:13,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145837374] [2021-06-05 14:35:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:13,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:13,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145837374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:13,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:13,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:13,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107077798] [2021-06-05 14:35:13,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:13,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:13,390 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:13,619 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-06-05 14:35:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:13,620 INFO L225 Difference]: With dead ends: 514 [2021-06-05 14:35:13,620 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 14:35:13,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 14:35:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2021-06-05 14:35:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.02) internal successors, (906), 300 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-06-05 14:35:13,623 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-06-05 14:35:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:13,624 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-06-05 14:35:13,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-06-05 14:35:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:13,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:13,624 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:13,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:13,824 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 418 times [2021-06-05 14:35:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:13,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822875172] [2021-06-05 14:35:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:13,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822875172] [2021-06-05 14:35:13,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822875172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665821752] [2021-06-05 14:35:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:13,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:13,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:13,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665821752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:14,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:14,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602872887] [2021-06-05 14:35:14,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:14,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:14,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:14,081 INFO L87 Difference]: Start difference. First operand 301 states and 906 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:14,268 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-06-05 14:35:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:14,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:14,269 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:35:14,269 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 14:35:14,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 14:35:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-06-05 14:35:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 14:35:14,273 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 14:35:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:14,273 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 14:35:14,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 14:35:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:14,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:14,274 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:14,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 14:35:14,474 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 419 times [2021-06-05 14:35:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:14,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027465816] [2021-06-05 14:35:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027465816] [2021-06-05 14:35:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027465816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235700516] [2021-06-05 14:35:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:14,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235700516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:14,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:14,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6077922] [2021-06-05 14:35:14,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:14,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:14,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:14,788 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:15,169 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-06-05 14:35:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:15,170 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:35:15,170 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:35:15,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:35:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-06-05 14:35:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0163398692810457) internal successors, (923), 306 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-06-05 14:35:15,174 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-06-05 14:35:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:15,174 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-06-05 14:35:15,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-06-05 14:35:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:15,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:15,175 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:15,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:15,375 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 420 times [2021-06-05 14:35:15,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:15,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94654721] [2021-06-05 14:35:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:15,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94654721] [2021-06-05 14:35:15,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94654721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323443499] [2021-06-05 14:35:15,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:15,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323443499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214268403] [2021-06-05 14:35:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:15,676 INFO L87 Difference]: Start difference. First operand 307 states and 923 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:16,005 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-06-05 14:35:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:16,006 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:35:16,006 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 14:35:16,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 14:35:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-06-05 14:35:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 14:35:16,010 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 14:35:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:16,010 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 14:35:16,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 14:35:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:16,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:16,010 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:16,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-06-05 14:35:16,211 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 421 times [2021-06-05 14:35:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:16,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742099008] [2021-06-05 14:35:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:16,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742099008] [2021-06-05 14:35:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742099008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591679186] [2021-06-05 14:35:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:16,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591679186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:16,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:16,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231188826] [2021-06-05 14:35:16,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:16,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:16,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:16,488 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:16,800 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-06-05 14:35:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:16,801 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:35:16,801 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:35:16,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:35:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-06-05 14:35:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.003257328990228) internal successors, (922), 307 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-06-05 14:35:16,805 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-06-05 14:35:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:16,805 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-06-05 14:35:16,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-06-05 14:35:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:16,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:16,806 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:17,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,006 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 422 times [2021-06-05 14:35:17,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:17,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784537528] [2021-06-05 14:35:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:17,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784537528] [2021-06-05 14:35:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784537528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018599959] [2021-06-05 14:35:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:17,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018599959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:17,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536786033] [2021-06-05 14:35:17,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:17,287 INFO L87 Difference]: Start difference. First operand 308 states and 922 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:17,635 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2021-06-05 14:35:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:17,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:17,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:17,636 INFO L225 Difference]: With dead ends: 543 [2021-06-05 14:35:17,636 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:35:17,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:35:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2021-06-05 14:35:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 14:35:17,640 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 14:35:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:17,640 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 14:35:17,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 14:35:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:17,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:17,640 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:17,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,841 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 423 times [2021-06-05 14:35:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902456584] [2021-06-05 14:35:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:17,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:17,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902456584] [2021-06-05 14:35:17,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902456584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514976537] [2021-06-05 14:35:17,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:18,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:18,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514976537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:18,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:18,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:18,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665878313] [2021-06-05 14:35:18,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:18,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:18,129 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:18,363 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-06-05 14:35:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:18,364 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:35:18,364 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:35:18,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:35:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 14:35:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.029032258064516) internal successors, (939), 310 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-06-05 14:35:18,368 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-06-05 14:35:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:18,368 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-06-05 14:35:18,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-06-05 14:35:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:18,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:18,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:18,577 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 424 times [2021-06-05 14:35:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171322630] [2021-06-05 14:35:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:18,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:18,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171322630] [2021-06-05 14:35:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171322630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:18,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116744860] [2021-06-05 14:35:18,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:18,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:18,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:18,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116744860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:18,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:18,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107774185] [2021-06-05 14:35:18,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:18,843 INFO L87 Difference]: Start difference. First operand 311 states and 939 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:19,091 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 14:35:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:19,092 INFO L225 Difference]: With dead ends: 505 [2021-06-05 14:35:19,092 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 14:35:19,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 14:35:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-06-05 14:35:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 14:35:19,096 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 14:35:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:19,096 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 14:35:19,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 14:35:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:19,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:19,097 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:19,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,297 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 425 times [2021-06-05 14:35:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841478436] [2021-06-05 14:35:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:19,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841478436] [2021-06-05 14:35:19,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841478436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526645511] [2021-06-05 14:35:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:19,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526645511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:19,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:19,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33250506] [2021-06-05 14:35:19,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:19,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:19,564 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:19,769 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-06-05 14:35:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:19,770 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:35:19,770 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 14:35:19,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 14:35:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-06-05 14:35:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 14:35:19,775 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 14:35:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:19,775 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 14:35:19,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 14:35:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:19,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:19,776 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:19,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3859,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,976 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 426 times [2021-06-05 14:35:19,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:19,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613142794] [2021-06-05 14:35:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613142794] [2021-06-05 14:35:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613142794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836376832] [2021-06-05 14:35:20,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:20,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836376832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:20,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:20,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716098862] [2021-06-05 14:35:20,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:20,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:20,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:20,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:20,236 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:20,425 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-06-05 14:35:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:20,426 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:35:20,426 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:35:20,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:35:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-06-05 14:35:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0064102564102564) internal successors, (938), 312 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-06-05 14:35:20,430 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-06-05 14:35:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:20,430 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-06-05 14:35:20,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-06-05 14:35:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:20,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:20,430 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:20,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,631 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 427 times [2021-06-05 14:35:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:20,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968734390] [2021-06-05 14:35:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968734390] [2021-06-05 14:35:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968734390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615063794] [2021-06-05 14:35:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615063794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:20,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118820995] [2021-06-05 14:35:20,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:20,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:20,876 INFO L87 Difference]: Start difference. First operand 313 states and 938 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:21,132 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-06-05 14:35:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:21,132 INFO L225 Difference]: With dead ends: 505 [2021-06-05 14:35:21,132 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 14:35:21,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 14:35:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-06-05 14:35:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 14:35:21,136 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 14:35:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:21,136 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 14:35:21,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 14:35:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:21,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:21,137 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:21,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:21,337 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 428 times [2021-06-05 14:35:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148420083] [2021-06-05 14:35:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:21,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148420083] [2021-06-05 14:35:21,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148420083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063114563] [2021-06-05 14:35:21,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:21,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:21,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063114563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:21,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008574595] [2021-06-05 14:35:21,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:21,588 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:21,796 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-06-05 14:35:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:21,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:21,797 INFO L225 Difference]: With dead ends: 480 [2021-06-05 14:35:21,797 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:35:21,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:35:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-06-05 14:35:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-06-05 14:35:21,804 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-06-05 14:35:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:21,804 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-06-05 14:35:21,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-06-05 14:35:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:21,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:21,804 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:22,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,005 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 429 times [2021-06-05 14:35:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:22,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273221730] [2021-06-05 14:35:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:22,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273221730] [2021-06-05 14:35:22,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273221730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128543861] [2021-06-05 14:35:22,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:22,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:22,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128543861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:22,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:22,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288387822] [2021-06-05 14:35:22,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:22,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:22,249 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:22,434 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-06-05 14:35:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:22,435 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:35:22,435 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 14:35:22,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 14:35:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-06-05 14:35:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 14:35:22,439 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 14:35:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:22,439 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 14:35:22,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 14:35:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:22,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:22,440 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,640 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 430 times [2021-06-05 14:35:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:22,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003940513] [2021-06-05 14:35:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:22,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003940513] [2021-06-05 14:35:22,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003940513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530176341] [2021-06-05 14:35:22,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530176341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:22,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:22,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546905532] [2021-06-05 14:35:22,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:22,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:22,900 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:23,151 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-06-05 14:35:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:23,152 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:35:23,152 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:35:23,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:35:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-06-05 14:35:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.980327868852459) internal successors, (909), 305 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-06-05 14:35:23,155 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-06-05 14:35:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:23,155 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-06-05 14:35:23,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-06-05 14:35:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:23,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:23,156 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,356 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 431 times [2021-06-05 14:35:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:23,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312889028] [2021-06-05 14:35:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:23,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:23,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312889028] [2021-06-05 14:35:23,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312889028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520392997] [2021-06-05 14:35:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:23,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520392997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:23,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852678500] [2021-06-05 14:35:23,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:23,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:23,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:23,618 INFO L87 Difference]: Start difference. First operand 306 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:23,803 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-06-05 14:35:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:23,804 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:35:23,804 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:35:23,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:35:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-06-05 14:35:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9726027397260273) internal successors, (868), 292 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-06-05 14:35:23,808 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-06-05 14:35:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:23,808 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-06-05 14:35:23,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-06-05 14:35:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:23,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:23,808 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:24,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,008 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 432 times [2021-06-05 14:35:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:24,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108327998] [2021-06-05 14:35:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:24,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108327998] [2021-06-05 14:35:24,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108327998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582265497] [2021-06-05 14:35:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582265497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:24,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:24,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945950986] [2021-06-05 14:35:24,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:24,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:24,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:24,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:24,229 INFO L87 Difference]: Start difference. First operand 293 states and 868 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:24,398 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-06-05 14:35:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:24,399 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:35:24,399 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 14:35:24,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 14:35:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-06-05 14:35:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 14:35:24,402 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 14:35:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:24,402 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 14:35:24,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 14:35:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:24,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:24,403 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:24,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,603 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 433 times [2021-06-05 14:35:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:24,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632684055] [2021-06-05 14:35:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:24,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632684055] [2021-06-05 14:35:24,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632684055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548478607] [2021-06-05 14:35:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548478607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:24,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:24,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560909183] [2021-06-05 14:35:24,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:24,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:24,833 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:25,023 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-06-05 14:35:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:25,024 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:35:25,024 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 14:35:25,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 14:35:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-06-05 14:35:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 14:35:25,028 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 14:35:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:25,028 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 14:35:25,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 14:35:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:25,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:25,028 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:25,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:25,229 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 434 times [2021-06-05 14:35:25,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:25,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4439393] [2021-06-05 14:35:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:25,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4439393] [2021-06-05 14:35:25,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4439393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304898259] [2021-06-05 14:35:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:25,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304898259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:25,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044415051] [2021-06-05 14:35:25,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:25,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:25,471 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:25,710 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-06-05 14:35:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:25,711 INFO L225 Difference]: With dead ends: 545 [2021-06-05 14:35:25,711 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 14:35:25,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 14:35:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-06-05 14:35:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.957377049180328) internal successors, (902), 305 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-06-05 14:35:25,714 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-06-05 14:35:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:25,714 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-06-05 14:35:25,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-06-05 14:35:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:25,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:25,715 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:25,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3925,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:25,915 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 435 times [2021-06-05 14:35:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:25,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920454547] [2021-06-05 14:35:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920454547] [2021-06-05 14:35:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920454547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779733774] [2021-06-05 14:35:25,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:26,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:26,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779733774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:26,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:35:26,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132204848] [2021-06-05 14:35:26,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:26,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:26,184 INFO L87 Difference]: Start difference. First operand 306 states and 902 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:26,380 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-06-05 14:35:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:26,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:26,381 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:35:26,381 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:35:26,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:35:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-06-05 14:35:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-06-05 14:35:26,385 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-06-05 14:35:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:26,385 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-06-05 14:35:26,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-06-05 14:35:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:26,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:26,385 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:26,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-05 14:35:26,586 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 436 times [2021-06-05 14:35:26,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:26,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318343523] [2021-06-05 14:35:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:26,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318343523] [2021-06-05 14:35:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318343523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912148022] [2021-06-05 14:35:26,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:26,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912148022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:26,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:26,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653132513] [2021-06-05 14:35:26,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:26,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:26,823 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:27,004 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-06-05 14:35:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:27,005 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:35:27,005 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:35:27,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:35:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-05 14:35:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 14:35:27,008 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 14:35:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:27,009 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 14:35:27,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 14:35:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:27,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:27,009 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:27,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,211 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 437 times [2021-06-05 14:35:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:27,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453926901] [2021-06-05 14:35:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:27,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453926901] [2021-06-05 14:35:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453926901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842282195] [2021-06-05 14:35:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:27,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842282195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:27,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:27,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149564173] [2021-06-05 14:35:27,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:27,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:27,433 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:27,644 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-06-05 14:35:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:27,644 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:35:27,645 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:35:27,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:35:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-06-05 14:35:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9489795918367347) internal successors, (867), 294 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-06-05 14:35:27,647 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-06-05 14:35:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:27,648 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-06-05 14:35:27,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-06-05 14:35:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:27,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:27,648 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:27,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,849 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 438 times [2021-06-05 14:35:27,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:27,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453262662] [2021-06-05 14:35:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:27,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:27,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453262662] [2021-06-05 14:35:27,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453262662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199712704] [2021-06-05 14:35:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:27,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199712704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:28,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:28,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956830771] [2021-06-05 14:35:28,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:28,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:28,073 INFO L87 Difference]: Start difference. First operand 295 states and 867 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:28,272 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-06-05 14:35:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:28,273 INFO L225 Difference]: With dead ends: 353 [2021-06-05 14:35:28,273 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 14:35:28,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 14:35:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-06-05 14:35:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9407894736842106) internal successors, (894), 304 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-06-05 14:35:28,282 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-06-05 14:35:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:28,282 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-06-05 14:35:28,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-06-05 14:35:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:28,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:28,283 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:28,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-05 14:35:28,483 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 439 times [2021-06-05 14:35:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743044230] [2021-06-05 14:35:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:28,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743044230] [2021-06-05 14:35:28,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743044230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886627647] [2021-06-05 14:35:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:28,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886627647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:28,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:28,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674455294] [2021-06-05 14:35:28,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:28,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:28,704 INFO L87 Difference]: Start difference. First operand 305 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:28,863 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-06-05 14:35:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:28,864 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:35:28,864 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 14:35:28,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 14:35:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-06-05 14:35:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.952054794520548) internal successors, (862), 292 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-06-05 14:35:28,867 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-06-05 14:35:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:28,867 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-06-05 14:35:28,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-06-05 14:35:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:28,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:28,867 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:29,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,068 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 440 times [2021-06-05 14:35:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:29,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075588992] [2021-06-05 14:35:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:29,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075588992] [2021-06-05 14:35:29,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075588992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181171327] [2021-06-05 14:35:29,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181171327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:29,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772253512] [2021-06-05 14:35:29,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:29,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:29,298 INFO L87 Difference]: Start difference. First operand 293 states and 862 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:29,439 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-06-05 14:35:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:29,440 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:35:29,440 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:35:29,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:35:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-06-05 14:35:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9444444444444446) internal successors, (901), 306 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-06-05 14:35:29,443 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-06-05 14:35:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:29,443 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-06-05 14:35:29,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-06-05 14:35:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:29,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:29,444 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:29,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-05 14:35:29,644 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 441 times [2021-06-05 14:35:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:29,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397367787] [2021-06-05 14:35:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:29,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397367787] [2021-06-05 14:35:29,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397367787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30548940] [2021-06-05 14:35:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:29,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30548940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:29,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:29,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137264387] [2021-06-05 14:35:29,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:29,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:29,851 INFO L87 Difference]: Start difference. First operand 307 states and 901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:30,023 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-06-05 14:35:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:30,024 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:35:30,024 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:35:30,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:35:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-06-05 14:35:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9473684210526314) internal successors, (896), 304 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-06-05 14:35:30,027 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-06-05 14:35:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:30,027 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-06-05 14:35:30,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-06-05 14:35:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:30,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:30,027 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,228 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 442 times [2021-06-05 14:35:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:30,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473132792] [2021-06-05 14:35:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473132792] [2021-06-05 14:35:30,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473132792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707447388] [2021-06-05 14:35:30,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707447388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:30,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065153567] [2021-06-05 14:35:30,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:30,426 INFO L87 Difference]: Start difference. First operand 305 states and 896 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:30,548 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-06-05 14:35:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:30,549 INFO L225 Difference]: With dead ends: 334 [2021-06-05 14:35:30,549 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 14:35:30,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 14:35:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-06-05 14:35:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 14:35:30,552 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 14:35:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:30,552 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 14:35:30,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 14:35:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:30,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:30,552 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:30,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,445 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,752 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 443 times [2021-06-05 14:35:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:30,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974577269] [2021-06-05 14:35:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:30,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974577269] [2021-06-05 14:35:30,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974577269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35930553] [2021-06-05 14:35:30,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:30,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:30,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35930553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:30,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344390022] [2021-06-05 14:35:30,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:30,952 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:31,093 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-06-05 14:35:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:31,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:31,094 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:35:31,094 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 14:35:31,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 14:35:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 14:35:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.948051948051948) internal successors, (908), 308 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-06-05 14:35:31,097 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-06-05 14:35:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:31,097 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-06-05 14:35:31,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-06-05 14:35:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:31,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:31,098 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:31,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,313 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 444 times [2021-06-05 14:35:31,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:31,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110232659] [2021-06-05 14:35:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:31,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110232659] [2021-06-05 14:35:31,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110232659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420950397] [2021-06-05 14:35:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420950397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323263460] [2021-06-05 14:35:31,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:31,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:31,514 INFO L87 Difference]: Start difference. First operand 309 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:31,683 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-06-05 14:35:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:31,683 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:35:31,683 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:35:31,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:35:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-06-05 14:35:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.950980392156863) internal successors, (903), 306 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-06-05 14:35:31,687 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-06-05 14:35:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:31,687 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-06-05 14:35:31,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-06-05 14:35:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:31,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:31,687 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:31,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 14:35:31,905 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 445 times [2021-06-05 14:35:31,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:31,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917506258] [2021-06-05 14:35:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:31,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917506258] [2021-06-05 14:35:31,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917506258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049555389] [2021-06-05 14:35:31,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049555389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:35:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815455267] [2021-06-05 14:35:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:35:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:35:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:35:32,155 INFO L87 Difference]: Start difference. First operand 307 states and 903 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:32,281 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-06-05 14:35:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:32,282 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:35:32,282 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 14:35:32,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 14:35:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-06-05 14:35:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9539473684210527) internal successors, (898), 304 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-06-05 14:35:32,286 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-06-05 14:35:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:32,286 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-06-05 14:35:32,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-06-05 14:35:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:32,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:32,286 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:32,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,487 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 446 times [2021-06-05 14:35:32,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:32,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117845920] [2021-06-05 14:35:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:32,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:32,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117845920] [2021-06-05 14:35:32,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117845920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798782361] [2021-06-05 14:35:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798782361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:32,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:35:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139451973] [2021-06-05 14:35:32,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:35:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:35:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:35:32,688 INFO L87 Difference]: Start difference. First operand 305 states and 898 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:32,822 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-06-05 14:35:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:32,823 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:35:32,823 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:35:32,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:35:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-06-05 14:35:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 14:35:32,826 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 14:35:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:32,826 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 14:35:32,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 14:35:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:32,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:32,827 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:33,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:33,027 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:33,027 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 447 times [2021-06-05 14:35:33,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:33,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631881667] [2021-06-05 14:35:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:33,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:33,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631881667] [2021-06-05 14:35:33,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631881667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:33,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911221884] [2021-06-05 14:35:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:33,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:33,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911221884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:33,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:33,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:33,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164510890] [2021-06-05 14:35:33,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:33,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:33,420 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,835 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-06-05 14:35:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:33,914 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-06-05 14:35:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:33,915 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:35:33,915 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 14:35:33,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 14:35:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-06-05 14:35:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 14:35:33,919 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 14:35:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:33,919 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 14:35:33,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 14:35:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:33,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:33,919 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:34,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4000,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:34,136 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 448 times [2021-06-05 14:35:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:34,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274419993] [2021-06-05 14:35:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:34,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274419993] [2021-06-05 14:35:34,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274419993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294711789] [2021-06-05 14:35:34,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:34,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:34,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:34,579 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 14:35:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:34,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294711789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:34,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:34,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:34,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344932449] [2021-06-05 14:35:34,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:34,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:34,607 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:35,049 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-06-05 14:35:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:35,050 INFO L225 Difference]: With dead ends: 598 [2021-06-05 14:35:35,050 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 14:35:35,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 14:35:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-06-05 14:35:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.983277591973244) internal successors, (892), 299 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-06-05 14:35:35,054 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-06-05 14:35:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:35,054 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-06-05 14:35:35,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-06-05 14:35:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:35,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:35,054 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:35,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 14:35:35,255 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 449 times [2021-06-05 14:35:35,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:35,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304288160] [2021-06-05 14:35:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:35,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:35,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304288160] [2021-06-05 14:35:35,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304288160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951829673] [2021-06-05 14:35:35,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:35,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:35,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951829673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045734789] [2021-06-05 14:35:35,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:35,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:35,760 INFO L87 Difference]: Start difference. First operand 300 states and 892 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:36,154 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-06-05 14:35:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:36,155 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:35:36,155 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:35:36,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:35:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-06-05 14:35:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 14:35:36,159 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 14:35:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:36,159 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 14:35:36,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 14:35:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:36,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:36,159 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:36,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-05 14:35:36,376 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 450 times [2021-06-05 14:35:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:36,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074264214] [2021-06-05 14:35:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:36,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074264214] [2021-06-05 14:35:36,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074264214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050301444] [2021-06-05 14:35:36,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:36,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:36,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:36,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050301444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:36,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:36,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:36,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907344288] [2021-06-05 14:35:36,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:36,644 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:36,979 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-06-05 14:35:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:36,980 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:35:36,980 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:35:36,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:35:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-06-05 14:35:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 14:35:36,983 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 14:35:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:36,984 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 14:35:36,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 14:35:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:36,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:36,984 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:37,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 14:35:37,185 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 451 times [2021-06-05 14:35:37,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:37,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357227364] [2021-06-05 14:35:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:37,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:37,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357227364] [2021-06-05 14:35:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357227364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:37,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590125993] [2021-06-05 14:35:37,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:37,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590125993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:37,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:37,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374190260] [2021-06-05 14:35:37,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:37,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:37,513 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:37,922 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-06-05 14:35:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:37,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:37,923 INFO L225 Difference]: With dead ends: 604 [2021-06-05 14:35:37,923 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 14:35:37,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 14:35:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-06-05 14:35:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.99) internal successors, (897), 300 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-06-05 14:35:37,927 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-06-05 14:35:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:37,927 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-06-05 14:35:37,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-06-05 14:35:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:37,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:37,927 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:38,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:38,128 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:38,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:38,128 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 452 times [2021-06-05 14:35:38,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:38,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514518587] [2021-06-05 14:35:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:38,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:38,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514518587] [2021-06-05 14:35:38,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514518587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:38,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120026402] [2021-06-05 14:35:38,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120026402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:38,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:38,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:38,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92356330] [2021-06-05 14:35:38,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:38,430 INFO L87 Difference]: Start difference. First operand 301 states and 897 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:38,864 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-06-05 14:35:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:38,865 INFO L225 Difference]: With dead ends: 610 [2021-06-05 14:35:38,865 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 14:35:38,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 14:35:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-06-05 14:35:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 14:35:38,869 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 14:35:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:38,869 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 14:35:38,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 14:35:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:38,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:38,870 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:39,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:39,070 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 453 times [2021-06-05 14:35:39,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:39,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661383528] [2021-06-05 14:35:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:39,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661383528] [2021-06-05 14:35:39,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661383528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516826153] [2021-06-05 14:35:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:39,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516826153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:39,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295997384] [2021-06-05 14:35:39,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:39,386 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:39,722 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-06-05 14:35:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:39,723 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:35:39,723 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:35:39,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:35:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-06-05 14:35:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 14:35:39,726 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 14:35:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:39,727 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 14:35:39,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 14:35:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:39,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:39,727 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:39,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 14:35:39,933 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 454 times [2021-06-05 14:35:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:39,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217546647] [2021-06-05 14:35:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217546647] [2021-06-05 14:35:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217546647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307759946] [2021-06-05 14:35:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:40,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:40,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307759946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:40,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:40,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:40,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209440066] [2021-06-05 14:35:40,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:40,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:40,269 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:40,879 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-06-05 14:35:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:40,880 INFO L225 Difference]: With dead ends: 682 [2021-06-05 14:35:40,880 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 14:35:40,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 14:35:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-06-05 14:35:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0165562913907285) internal successors, (911), 302 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-06-05 14:35:40,885 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-06-05 14:35:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:40,885 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-06-05 14:35:40,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-06-05 14:35:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:40,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:40,885 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:41,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-05 14:35:41,101 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 455 times [2021-06-05 14:35:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:41,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134224247] [2021-06-05 14:35:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:41,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:41,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134224247] [2021-06-05 14:35:41,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134224247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:41,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205003729] [2021-06-05 14:35:41,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:41,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:41,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:41,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205003729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:41,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:41,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561557583] [2021-06-05 14:35:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:41,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:41,436 INFO L87 Difference]: Start difference. First operand 303 states and 911 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,930 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:35:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:42,134 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-06-05 14:35:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:42,135 INFO L225 Difference]: With dead ends: 688 [2021-06-05 14:35:42,135 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 14:35:42,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 720.1ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 14:35:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-06-05 14:35:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-06-05 14:35:42,139 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-06-05 14:35:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:42,139 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-06-05 14:35:42,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-06-05 14:35:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:42,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:42,139 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:42,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-05 14:35:42,345 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 456 times [2021-06-05 14:35:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809135524] [2021-06-05 14:35:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:42,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:42,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809135524] [2021-06-05 14:35:42,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809135524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:42,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741659952] [2021-06-05 14:35:42,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:42,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:42,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741659952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:42,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:42,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301923844] [2021-06-05 14:35:42,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:42,653 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:42,979 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-06-05 14:35:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:42,980 INFO L225 Difference]: With dead ends: 650 [2021-06-05 14:35:42,980 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 14:35:42,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 14:35:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-06-05 14:35:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0033557046979866) internal successors, (895), 298 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-06-05 14:35:42,984 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-06-05 14:35:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-06-05 14:35:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-06-05 14:35:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:42,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:42,985 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:43,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:43,185 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 457 times [2021-06-05 14:35:43,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:43,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2842524] [2021-06-05 14:35:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:43,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:43,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2842524] [2021-06-05 14:35:43,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2842524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:43,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123600329] [2021-06-05 14:35:43,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:43,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123600329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:43,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:43,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:43,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459189664] [2021-06-05 14:35:43,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:43,497 INFO L87 Difference]: Start difference. First operand 299 states and 895 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:43,811 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-06-05 14:35:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:43,812 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:35:43,812 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 14:35:43,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 14:35:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-06-05 14:35:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.983050847457627) internal successors, (880), 295 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-06-05 14:35:43,816 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-06-05 14:35:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:43,816 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-06-05 14:35:43,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-06-05 14:35:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:43,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:43,817 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:44,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:44,021 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 458 times [2021-06-05 14:35:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:44,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289385862] [2021-06-05 14:35:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:44,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:44,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289385862] [2021-06-05 14:35:44,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289385862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:44,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131228975] [2021-06-05 14:35:44,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:44,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131228975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:44,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:44,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248487939] [2021-06-05 14:35:44,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:44,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:44,321 INFO L87 Difference]: Start difference. First operand 296 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:44,881 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-06-05 14:35:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:44,882 INFO L225 Difference]: With dead ends: 650 [2021-06-05 14:35:44,883 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 14:35:44,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 14:35:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-06-05 14:35:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9737704918032786) internal successors, (907), 305 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-06-05 14:35:44,887 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-06-05 14:35:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:44,887 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-06-05 14:35:44,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-06-05 14:35:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:44,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:44,887 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:45,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-06-05 14:35:45,088 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 459 times [2021-06-05 14:35:45,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:45,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008395740] [2021-06-05 14:35:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:45,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008395740] [2021-06-05 14:35:45,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008395740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293138297] [2021-06-05 14:35:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293138297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:45,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:45,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927942698] [2021-06-05 14:35:45,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:45,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:45,434 INFO L87 Difference]: Start difference. First operand 306 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:45,971 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-06-05 14:35:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:45,972 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:35:45,972 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 14:35:45,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 14:35:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-06-05 14:35:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 14:35:45,976 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 14:35:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:45,976 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 14:35:45,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 14:35:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:45,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:45,976 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:46,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:46,177 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 460 times [2021-06-05 14:35:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:46,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756197178] [2021-06-05 14:35:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:46,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756197178] [2021-06-05 14:35:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756197178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214424390] [2021-06-05 14:35:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:46,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:46,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:46,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214424390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:46,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:46,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:46,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303286115] [2021-06-05 14:35:46,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:46,545 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:46,902 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-06-05 14:35:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:46,902 INFO L225 Difference]: With dead ends: 567 [2021-06-05 14:35:46,903 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 14:35:46,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 14:35:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-06-05 14:35:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.972972972972973) internal successors, (880), 296 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-06-05 14:35:46,906 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-06-05 14:35:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:46,906 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-06-05 14:35:46,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-06-05 14:35:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:46,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:46,907 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:47,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:47,107 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 461 times [2021-06-05 14:35:47,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:47,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532215609] [2021-06-05 14:35:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:47,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:47,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532215609] [2021-06-05 14:35:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532215609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:47,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439032897] [2021-06-05 14:35:47,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:47,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:47,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:47,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439032897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:47,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:47,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:47,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115168116] [2021-06-05 14:35:47,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:47,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:47,432 INFO L87 Difference]: Start difference. First operand 297 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:47,864 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-06-05 14:35:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:47,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:47,865 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:35:47,865 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:35:47,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:35:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-06-05 14:35:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 14:35:47,869 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 14:35:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:47,869 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 14:35:47,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 14:35:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:47,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:47,870 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:48,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4127 [2021-06-05 14:35:48,070 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 462 times [2021-06-05 14:35:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:48,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501460465] [2021-06-05 14:35:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501460465] [2021-06-05 14:35:48,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501460465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135068713] [2021-06-05 14:35:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:48,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135068713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:48,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991554415] [2021-06-05 14:35:48,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:48,376 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:48,675 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 14:35:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:48,676 INFO L225 Difference]: With dead ends: 563 [2021-06-05 14:35:48,676 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:35:48,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:35:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-06-05 14:35:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 14:35:48,680 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 14:35:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:48,680 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 14:35:48,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 14:35:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:48,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:48,681 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:48,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 14:35:48,889 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 463 times [2021-06-05 14:35:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:48,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399370196] [2021-06-05 14:35:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:48,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399370196] [2021-06-05 14:35:48,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399370196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466285824] [2021-06-05 14:35:48,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:49,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466285824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:49,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:49,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:35:49,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524119264] [2021-06-05 14:35:49,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:49,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:49,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:49,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:49,163 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:49,489 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-06-05 14:35:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:49,490 INFO L225 Difference]: With dead ends: 651 [2021-06-05 14:35:49,490 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:35:49,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:35:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-06-05 14:35:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9661016949152543) internal successors, (875), 295 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-06-05 14:35:49,494 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-06-05 14:35:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:49,494 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-06-05 14:35:49,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-06-05 14:35:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:49,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:49,495 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:49,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 14:35:49,695 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 464 times [2021-06-05 14:35:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:49,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126550824] [2021-06-05 14:35:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:49,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126550824] [2021-06-05 14:35:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126550824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145907650] [2021-06-05 14:35:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:49,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145907650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:49,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:49,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:49,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460748057] [2021-06-05 14:35:49,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:49,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:49,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:49,992 INFO L87 Difference]: Start difference. First operand 296 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:50,335 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-06-05 14:35:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:50,336 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:35:50,336 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:35:50,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:35:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-06-05 14:35:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.962962962962963) internal successors, (880), 297 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-06-05 14:35:50,340 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-06-05 14:35:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:50,340 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-06-05 14:35:50,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-06-05 14:35:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:50,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:50,340 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:50,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:50,541 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 465 times [2021-06-05 14:35:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:50,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425343970] [2021-06-05 14:35:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:50,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:50,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425343970] [2021-06-05 14:35:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425343970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:50,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552047259] [2021-06-05 14:35:50,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:50,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552047259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:50,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:50,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069686331] [2021-06-05 14:35:50,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:50,858 INFO L87 Difference]: Start difference. First operand 298 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:51,397 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-06-05 14:35:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:51,398 INFO L225 Difference]: With dead ends: 637 [2021-06-05 14:35:51,398 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:35:51,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:35:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 14:35:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 14:35:51,403 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 14:35:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:51,403 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 14:35:51,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 14:35:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:51,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:51,403 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:51,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-05 14:35:51,604 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 466 times [2021-06-05 14:35:51,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:51,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873272012] [2021-06-05 14:35:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:51,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:51,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873272012] [2021-06-05 14:35:51,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873272012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:51,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168617791] [2021-06-05 14:35:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168617791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670551591] [2021-06-05 14:35:51,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:51,942 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:52,325 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-06-05 14:35:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:52,326 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:35:52,326 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 14:35:52,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 14:35:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-06-05 14:35:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 14:35:52,330 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 14:35:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:52,330 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 14:35:52,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 14:35:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:52,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:52,330 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:52,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:52,537 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 467 times [2021-06-05 14:35:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:52,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465119718] [2021-06-05 14:35:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:52,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:52,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465119718] [2021-06-05 14:35:52,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465119718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:52,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004072834] [2021-06-05 14:35:52,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:52,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:52,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004072834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:52,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:52,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:52,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379325671] [2021-06-05 14:35:52,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:52,887 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,122 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 14:35:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:53,192 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-06-05 14:35:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:53,193 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:35:53,193 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:35:53,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:35:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-06-05 14:35:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 14:35:53,196 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 14:35:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:53,196 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 14:35:53,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 14:35:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:53,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:53,197 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:53,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:53,413 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 468 times [2021-06-05 14:35:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:53,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218133837] [2021-06-05 14:35:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:53,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218133837] [2021-06-05 14:35:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218133837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577595750] [2021-06-05 14:35:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:53,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:53,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:53,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577595750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:53,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:53,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:53,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327193795] [2021-06-05 14:35:53,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:53,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:53,736 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:54,055 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-06-05 14:35:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:54,055 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:35:54,055 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:35:54,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:35:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-06-05 14:35:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 14:35:54,059 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 14:35:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:54,059 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 14:35:54,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 14:35:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:54,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:54,059 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:54,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-06-05 14:35:54,265 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 469 times [2021-06-05 14:35:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:54,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135787967] [2021-06-05 14:35:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:54,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135787967] [2021-06-05 14:35:54,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135787967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707607499] [2021-06-05 14:35:54,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:54,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707607499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:54,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:54,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102718305] [2021-06-05 14:35:54,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:54,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:54,602 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:54,891 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-06-05 14:35:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:54,892 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:35:54,892 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:35:54,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:35:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-06-05 14:35:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 14:35:54,895 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 14:35:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:54,895 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 14:35:54,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 14:35:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:54,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:54,896 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:55,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4199 [2021-06-05 14:35:55,112 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 470 times [2021-06-05 14:35:55,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:55,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140493922] [2021-06-05 14:35:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:55,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:55,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140493922] [2021-06-05 14:35:55,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140493922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:55,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301175028] [2021-06-05 14:35:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:55,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301175028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:55,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:55,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23827055] [2021-06-05 14:35:55,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:55,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:55,427 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:55,738 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-06-05 14:35:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:55,739 INFO L225 Difference]: With dead ends: 576 [2021-06-05 14:35:55,739 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:35:55,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:35:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-06-05 14:35:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 14:35:55,743 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 14:35:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:55,743 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 14:35:55,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 14:35:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:55,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:55,743 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:55,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4206,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:55,944 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 471 times [2021-06-05 14:35:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:55,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954652609] [2021-06-05 14:35:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954652609] [2021-06-05 14:35:56,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954652609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109656634] [2021-06-05 14:35:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:56,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109656634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:56,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902858276] [2021-06-05 14:35:56,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:56,239 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:56,581 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-06-05 14:35:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:56,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:56,582 INFO L225 Difference]: With dead ends: 582 [2021-06-05 14:35:56,582 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:35:56,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:35:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-06-05 14:35:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 14:35:56,586 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 14:35:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:56,586 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 14:35:56,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 14:35:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:56,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:56,587 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:56,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4218 [2021-06-05 14:35:56,787 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:56,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 472 times [2021-06-05 14:35:56,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:56,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411638824] [2021-06-05 14:35:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411638824] [2021-06-05 14:35:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411638824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411196453] [2021-06-05 14:35:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:56,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:56,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411196453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:57,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:57,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:57,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319943804] [2021-06-05 14:35:57,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:57,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:57,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:57,131 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:57,343 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-06-05 14:35:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:57,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:57,344 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:35:57,344 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:35:57,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:35:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-06-05 14:35:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 14:35:57,347 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 14:35:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:57,347 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 14:35:57,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 14:35:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:57,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:57,348 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:57,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:57,564 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 473 times [2021-06-05 14:35:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365098925] [2021-06-05 14:35:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:57,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365098925] [2021-06-05 14:35:57,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365098925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771277931] [2021-06-05 14:35:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:57,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771277931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:57,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:57,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:57,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50237465] [2021-06-05 14:35:57,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:57,870 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:58,127 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 14:35:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:58,128 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:35:58,128 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 14:35:58,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 14:35:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-06-05 14:35:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 14:35:58,141 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 14:35:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:58,141 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 14:35:58,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 14:35:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:58,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:58,141 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:58,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,345 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 474 times [2021-06-05 14:35:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146410350] [2021-06-05 14:35:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:58,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:58,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146410350] [2021-06-05 14:35:58,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146410350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:58,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485332336] [2021-06-05 14:35:58,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:58,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:58,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485332336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:58,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:58,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:58,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319841622] [2021-06-05 14:35:58,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:58,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:58,678 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:59,012 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-06-05 14:35:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:59,013 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:35:59,013 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 14:35:59,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 14:35:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-06-05 14:35:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 14:35:59,017 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 14:35:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:59,017 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 14:35:59,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 14:35:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:59,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:59,017 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:59,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4242 [2021-06-05 14:35:59,218 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 475 times [2021-06-05 14:35:59,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:59,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297510316] [2021-06-05 14:35:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:59,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297510316] [2021-06-05 14:35:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297510316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459622562] [2021-06-05 14:35:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:35:59,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:59,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459622562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:59,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:59,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:35:59,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190749782] [2021-06-05 14:35:59,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:59,535 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:59,884 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-06-05 14:35:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:35:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:59,885 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:35:59,885 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:35:59,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:35:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 14:35:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 14:35:59,889 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 14:35:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:59,889 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 14:35:59,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 14:35:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:35:59,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:59,889 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:00,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4254 [2021-06-05 14:36:00,106 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 476 times [2021-06-05 14:36:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:00,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977888862] [2021-06-05 14:36:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:00,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:00,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977888862] [2021-06-05 14:36:00,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977888862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:00,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846482919] [2021-06-05 14:36:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:00,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:00,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846482919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:00,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:00,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:00,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107007595] [2021-06-05 14:36:00,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:00,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:00,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:00,405 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:00,690 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-06-05 14:36:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:00,691 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:36:00,691 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 14:36:00,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 14:36:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-06-05 14:36:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 14:36:00,694 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 14:36:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:00,695 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 14:36:00,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 14:36:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:00,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:00,695 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:00,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-06-05 14:36:00,895 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 477 times [2021-06-05 14:36:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:00,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604800413] [2021-06-05 14:36:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:00,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604800413] [2021-06-05 14:36:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604800413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851345244] [2021-06-05 14:36:00,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:01,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:01,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:01,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851345244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:01,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:01,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643898187] [2021-06-05 14:36:01,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:01,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:01,227 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:01,488 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-06-05 14:36:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:01,489 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:36:01,489 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:36:01,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:36:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-06-05 14:36:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 14:36:01,493 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 14:36:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:01,493 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 14:36:01,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 14:36:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:01,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:01,493 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:01,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-06-05 14:36:01,694 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 478 times [2021-06-05 14:36:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:01,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367702412] [2021-06-05 14:36:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:01,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:01,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367702412] [2021-06-05 14:36:01,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367702412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:01,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918312253] [2021-06-05 14:36:01,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:01,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:02,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918312253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:02,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:02,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:02,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696785263] [2021-06-05 14:36:02,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:02,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:02,009 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:02,193 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-06-05 14:36:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:02,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:02,193 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:36:02,194 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:36:02,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:36:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-06-05 14:36:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:36:02,197 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 14:36:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:02,197 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:36:02,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:36:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:02,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:02,197 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:02,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:02,398 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 479 times [2021-06-05 14:36:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:02,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28181059] [2021-06-05 14:36:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:02,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28181059] [2021-06-05 14:36:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28181059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541993136] [2021-06-05 14:36:02,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:02,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:02,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:02,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541993136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072218700] [2021-06-05 14:36:02,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:02,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:02,676 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:02,915 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-06-05 14:36:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:02,916 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:36:02,916 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:36:02,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:36:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-06-05 14:36:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 14:36:02,920 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 14:36:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:02,920 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 14:36:02,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 14:36:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:02,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:02,920 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 14:36:03,121 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 480 times [2021-06-05 14:36:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068967851] [2021-06-05 14:36:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:03,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068967851] [2021-06-05 14:36:03,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068967851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58985599] [2021-06-05 14:36:03,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:03,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58985599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:03,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:03,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178003275] [2021-06-05 14:36:03,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:03,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:03,410 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:03,619 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-06-05 14:36:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:03,620 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:36:03,620 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:36:03,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:36:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-06-05 14:36:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 14:36:03,624 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 14:36:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:03,624 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 14:36:03,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 14:36:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:03,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:03,624 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:03,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,824 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 481 times [2021-06-05 14:36:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:03,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900897766] [2021-06-05 14:36:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:03,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900897766] [2021-06-05 14:36:03,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900897766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37349044] [2021-06-05 14:36:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:04,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37349044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:04,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:04,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:04,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615425358] [2021-06-05 14:36:04,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:04,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:04,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:04,121 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:04,309 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-06-05 14:36:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:04,310 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:36:04,310 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 14:36:04,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 14:36:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-06-05 14:36:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 14:36:04,314 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 14:36:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:04,315 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 14:36:04,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 14:36:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:04,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:04,315 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:04,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:04,516 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:04,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 482 times [2021-06-05 14:36:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:04,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272332762] [2021-06-05 14:36:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:04,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272332762] [2021-06-05 14:36:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272332762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:04,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299395337] [2021-06-05 14:36:04,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:04,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:04,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:04,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299395337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:04,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:04,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504732342] [2021-06-05 14:36:04,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:04,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:04,790 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:04,949 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-06-05 14:36:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:04,950 INFO L225 Difference]: With dead ends: 555 [2021-06-05 14:36:04,950 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 14:36:04,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 14:36:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-06-05 14:36:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 14:36:04,954 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 14:36:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:04,954 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 14:36:04,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 14:36:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:04,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:04,954 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:05,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,169 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 483 times [2021-06-05 14:36:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:05,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176871107] [2021-06-05 14:36:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:05,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176871107] [2021-06-05 14:36:05,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176871107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430422483] [2021-06-05 14:36:05,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:05,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430422483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:05,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:05,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606855283] [2021-06-05 14:36:05,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:05,442 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:05,632 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-06-05 14:36:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:05,633 INFO L225 Difference]: With dead ends: 580 [2021-06-05 14:36:05,633 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:36:05,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:36:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-06-05 14:36:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 14:36:05,637 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 14:36:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:05,637 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 14:36:05,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 14:36:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:05,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:05,637 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:05,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-05 14:36:05,838 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 484 times [2021-06-05 14:36:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982154394] [2021-06-05 14:36:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982154394] [2021-06-05 14:36:05,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982154394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460135920] [2021-06-05 14:36:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:05,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:05,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:06,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460135920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:06,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:06,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:06,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190664138] [2021-06-05 14:36:06,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:06,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:06,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:06,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:06,121 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:06,366 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-06-05 14:36:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:06,367 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:36:06,367 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:36:06,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:36:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-06-05 14:36:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 14:36:06,371 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 14:36:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:06,371 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 14:36:06,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 14:36:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:06,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:06,371 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:06,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 14:36:06,572 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 485 times [2021-06-05 14:36:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:06,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986418363] [2021-06-05 14:36:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:06,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986418363] [2021-06-05 14:36:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986418363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609984300] [2021-06-05 14:36:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:06,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:06,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:06,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609984300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:06,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:06,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:06,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077691062] [2021-06-05 14:36:06,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:06,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:06,873 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:07,028 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-06-05 14:36:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:07,029 INFO L225 Difference]: With dead ends: 516 [2021-06-05 14:36:07,029 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 14:36:07,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 14:36:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-06-05 14:36:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 14:36:07,033 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 14:36:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:07,033 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 14:36:07,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 14:36:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:07,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:07,034 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:07,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-06-05 14:36:07,234 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 486 times [2021-06-05 14:36:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:07,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315791016] [2021-06-05 14:36:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315791016] [2021-06-05 14:36:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315791016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540090991] [2021-06-05 14:36:07,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:07,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:07,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:07,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540090991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:07,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211641015] [2021-06-05 14:36:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:07,517 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:07,677 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-06-05 14:36:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:07,678 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:36:07,678 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 14:36:07,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 14:36:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-06-05 14:36:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 14:36:07,682 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 14:36:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:07,682 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 14:36:07,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 14:36:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:07,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:07,683 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:07,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-06-05 14:36:07,883 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 487 times [2021-06-05 14:36:07,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:07,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021542200] [2021-06-05 14:36:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:07,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021542200] [2021-06-05 14:36:07,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021542200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483496861] [2021-06-05 14:36:07,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:08,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483496861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:08,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:08,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:08,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378649846] [2021-06-05 14:36:08,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:08,151 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:08,332 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-06-05 14:36:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:08,333 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:36:08,333 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 14:36:08,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 14:36:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-06-05 14:36:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 14:36:08,336 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 14:36:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:08,336 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 14:36:08,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 14:36:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:08,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:08,337 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:08,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-06-05 14:36:08,537 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 488 times [2021-06-05 14:36:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8945311] [2021-06-05 14:36:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:08,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:08,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8945311] [2021-06-05 14:36:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8945311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622358207] [2021-06-05 14:36:08,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:08,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622358207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:08,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:08,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680778206] [2021-06-05 14:36:08,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:08,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:08,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:08,832 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:09,014 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-06-05 14:36:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:09,015 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:36:09,015 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:36:09,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:36:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-06-05 14:36:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 14:36:09,018 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 14:36:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:09,018 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 14:36:09,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 14:36:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:09,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:09,019 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:09,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:09,219 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 489 times [2021-06-05 14:36:09,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:09,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487800599] [2021-06-05 14:36:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:09,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487800599] [2021-06-05 14:36:09,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487800599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235109793] [2021-06-05 14:36:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235109793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:09,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:09,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46804589] [2021-06-05 14:36:09,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:09,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:09,495 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:09,710 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-06-05 14:36:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:09,711 INFO L225 Difference]: With dead ends: 510 [2021-06-05 14:36:09,711 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:36:09,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:36:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-06-05 14:36:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 14:36:09,714 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 14:36:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:09,715 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 14:36:09,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 14:36:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:09,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:09,715 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:09,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-06-05 14:36:09,915 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 490 times [2021-06-05 14:36:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:09,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847872963] [2021-06-05 14:36:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847872963] [2021-06-05 14:36:09,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847872963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25127831] [2021-06-05 14:36:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:10,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25127831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:10,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990595239] [2021-06-05 14:36:10,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:10,193 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:10,391 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-06-05 14:36:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:10,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:10,392 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:36:10,392 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:36:10,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:36:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-06-05 14:36:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:36:10,395 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 14:36:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:10,395 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:36:10,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:36:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:10,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:10,396 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:10,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,596 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 491 times [2021-06-05 14:36:10,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:10,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531861418] [2021-06-05 14:36:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531861418] [2021-06-05 14:36:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531861418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239098340] [2021-06-05 14:36:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239098340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:10,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061117874] [2021-06-05 14:36:10,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:10,852 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:11,027 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-06-05 14:36:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:11,028 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:36:11,028 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:36:11,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:36:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-06-05 14:36:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 14:36:11,031 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 14:36:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:11,031 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 14:36:11,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 14:36:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:11,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:11,032 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:11,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:11,232 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 492 times [2021-06-05 14:36:11,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:11,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017286765] [2021-06-05 14:36:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017286765] [2021-06-05 14:36:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017286765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014622433] [2021-06-05 14:36:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:11,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:11,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:11,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014622433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:11,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:11,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:11,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039336600] [2021-06-05 14:36:11,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:11,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:11,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:11,489 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:11,726 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-06-05 14:36:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:11,727 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:36:11,727 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 14:36:11,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 14:36:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-06-05 14:36:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 14:36:11,730 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 14:36:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:11,731 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 14:36:11,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 14:36:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:11,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:11,731 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:11,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:11,931 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 493 times [2021-06-05 14:36:11,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:11,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759245630] [2021-06-05 14:36:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:11,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:11,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759245630] [2021-06-05 14:36:11,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759245630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:11,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543129393] [2021-06-05 14:36:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:12,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543129393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:12,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:12,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:12,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7068261] [2021-06-05 14:36:12,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:12,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:12,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:12,201 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:12,344 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-06-05 14:36:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:12,345 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:36:12,345 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:36:12,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:36:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-06-05 14:36:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 14:36:12,348 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 14:36:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:12,349 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 14:36:12,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 14:36:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:12,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:12,349 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:12,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:12,549 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:12,550 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 494 times [2021-06-05 14:36:12,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:12,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140073567] [2021-06-05 14:36:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:12,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140073567] [2021-06-05 14:36:12,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140073567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:12,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002505149] [2021-06-05 14:36:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:12,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:12,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002505149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:12,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:12,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:12,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104747921] [2021-06-05 14:36:12,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:12,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:12,799 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:12,968 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-06-05 14:36:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:12,969 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:36:12,969 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:36:12,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:36:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-06-05 14:36:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 14:36:12,972 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 14:36:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:12,972 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 14:36:12,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 14:36:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:12,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:12,973 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:13,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,173 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 495 times [2021-06-05 14:36:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:13,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2871873] [2021-06-05 14:36:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2871873] [2021-06-05 14:36:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2871873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297093677] [2021-06-05 14:36:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:13,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297093677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:13,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:13,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350467414] [2021-06-05 14:36:13,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:13,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:13,422 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:13,622 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-06-05 14:36:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:13,622 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:36:13,622 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:36:13,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:36:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-06-05 14:36:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 14:36:13,626 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 14:36:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:13,626 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 14:36:13,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 14:36:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:13,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:13,627 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:13,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-05 14:36:13,827 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 496 times [2021-06-05 14:36:13,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:13,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984969368] [2021-06-05 14:36:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984969368] [2021-06-05 14:36:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984969368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314393734] [2021-06-05 14:36:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:14,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314393734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:14,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:14,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:14,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836502447] [2021-06-05 14:36:14,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:14,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:14,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:14,062 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:14,208 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-06-05 14:36:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:14,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:14,209 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:36:14,209 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:36:14,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:36:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-06-05 14:36:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 14:36:14,212 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 14:36:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:14,212 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 14:36:14,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 14:36:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:14,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:14,212 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:14,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:14,413 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 497 times [2021-06-05 14:36:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:14,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646556329] [2021-06-05 14:36:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:14,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646556329] [2021-06-05 14:36:14,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646556329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405682194] [2021-06-05 14:36:14,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:14,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:14,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405682194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:14,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:14,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:14,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197648718] [2021-06-05 14:36:14,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:14,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:14,656 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:14,903 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-06-05 14:36:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:14,904 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:36:14,904 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:36:14,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:36:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-06-05 14:36:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 14:36:14,907 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 14:36:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:14,907 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 14:36:14,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 14:36:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:14,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:14,908 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:15,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4438 [2021-06-05 14:36:15,108 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 498 times [2021-06-05 14:36:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:15,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862288590] [2021-06-05 14:36:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:15,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862288590] [2021-06-05 14:36:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862288590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621988795] [2021-06-05 14:36:15,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:15,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:15,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621988795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:15,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:15,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:15,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311180150] [2021-06-05 14:36:15,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:15,372 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:15,610 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-06-05 14:36:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:15,611 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:36:15,611 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:36:15,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:36:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-06-05 14:36:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 14:36:15,615 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 14:36:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:15,615 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 14:36:15,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 14:36:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:15,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:15,616 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:15,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:15,816 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:15,816 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 499 times [2021-06-05 14:36:15,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:15,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282812763] [2021-06-05 14:36:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:15,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:15,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282812763] [2021-06-05 14:36:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282812763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:15,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032522331] [2021-06-05 14:36:15,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:15,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032522331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:16,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480151931] [2021-06-05 14:36:16,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:16,072 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:16,392 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-06-05 14:36:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:16,393 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:36:16,393 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:36:16,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:36:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-06-05 14:36:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 14:36:16,397 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 14:36:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:16,397 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 14:36:16,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 14:36:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:16,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:16,398 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:16,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-06-05 14:36:16,598 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 500 times [2021-06-05 14:36:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:16,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971452057] [2021-06-05 14:36:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:16,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971452057] [2021-06-05 14:36:16,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971452057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864507066] [2021-06-05 14:36:16,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:16,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864507066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:16,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662811432] [2021-06-05 14:36:16,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:16,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:16,864 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:17,093 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-06-05 14:36:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:17,094 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:36:17,094 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:36:17,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:36:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 14:36:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 14:36:17,098 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 14:36:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:17,098 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 14:36:17,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 14:36:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:17,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:17,099 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:17,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:17,299 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 501 times [2021-06-05 14:36:17,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:17,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736628850] [2021-06-05 14:36:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:17,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736628850] [2021-06-05 14:36:17,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736628850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377094736] [2021-06-05 14:36:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:17,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377094736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684258163] [2021-06-05 14:36:17,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:17,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:17,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:17,535 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:17,722 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-06-05 14:36:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:17,723 INFO L225 Difference]: With dead ends: 470 [2021-06-05 14:36:17,723 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 14:36:17,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 14:36:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-06-05 14:36:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 14:36:17,726 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 14:36:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:17,726 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 14:36:17,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 14:36:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:17,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:17,727 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4461 [2021-06-05 14:36:17,927 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 502 times [2021-06-05 14:36:17,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:17,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903281142] [2021-06-05 14:36:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903281142] [2021-06-05 14:36:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903281142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782549009] [2021-06-05 14:36:17,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:18,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782549009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:18,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:18,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776872013] [2021-06-05 14:36:18,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:18,172 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,411 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-06-05 14:36:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,411 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:36:18,412 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:36:18,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:36:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-06-05 14:36:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 14:36:18,415 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 14:36:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,415 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 14:36:18,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 14:36:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:18,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,416 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4466,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:18,616 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 503 times [2021-06-05 14:36:18,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330127466] [2021-06-05 14:36:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330127466] [2021-06-05 14:36:18,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330127466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753742668] [2021-06-05 14:36:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:18,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:18,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753742668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:18,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:18,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40319694] [2021-06-05 14:36:18,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:18,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:18,865 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:19,022 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-06-05 14:36:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:19,023 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:36:19,023 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 14:36:19,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 14:36:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-06-05 14:36:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 14:36:19,026 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 14:36:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:19,026 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 14:36:19,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 14:36:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:19,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:19,027 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:19,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-05 14:36:19,227 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 504 times [2021-06-05 14:36:19,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:19,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147443865] [2021-06-05 14:36:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:19,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147443865] [2021-06-05 14:36:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147443865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44402823] [2021-06-05 14:36:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:19,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44402823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:19,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:19,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812887722] [2021-06-05 14:36:19,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:19,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:19,458 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:19,624 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-06-05 14:36:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:19,625 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:36:19,625 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:36:19,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:36:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-06-05 14:36:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 14:36:19,629 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 14:36:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:19,629 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 14:36:19,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 14:36:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:19,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:19,629 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:19,830 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 505 times [2021-06-05 14:36:19,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:19,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944471838] [2021-06-05 14:36:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944471838] [2021-06-05 14:36:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944471838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381998371] [2021-06-05 14:36:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381998371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:20,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:20,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399194249] [2021-06-05 14:36:20,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:20,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:20,090 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:20,292 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-06-05 14:36:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:20,293 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:36:20,293 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 14:36:20,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 14:36:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-06-05 14:36:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 14:36:20,297 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 14:36:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:20,297 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 14:36:20,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 14:36:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:20,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:20,297 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:20,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,498 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 506 times [2021-06-05 14:36:20,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:20,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413509478] [2021-06-05 14:36:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413509478] [2021-06-05 14:36:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413509478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415922614] [2021-06-05 14:36:20,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:20,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415922614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:20,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757397989] [2021-06-05 14:36:20,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:20,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:20,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:20,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:20,729 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:20,913 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-06-05 14:36:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:20,914 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:36:20,914 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:36:20,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:36:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-06-05 14:36:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 14:36:20,917 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 14:36:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:20,917 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 14:36:20,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 14:36:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:20,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:20,918 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:21,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:21,118 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 507 times [2021-06-05 14:36:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:21,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740277401] [2021-06-05 14:36:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740277401] [2021-06-05 14:36:21,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740277401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092329922] [2021-06-05 14:36:21,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:21,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092329922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050022930] [2021-06-05 14:36:21,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:21,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:21,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:21,440 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:21,636 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-06-05 14:36:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:21,637 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:36:21,637 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:36:21,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:36:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-06-05 14:36:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 14:36:21,640 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 14:36:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:21,640 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 14:36:21,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 14:36:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:21,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:21,641 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:21,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-06-05 14:36:21,841 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 508 times [2021-06-05 14:36:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502446739] [2021-06-05 14:36:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502446739] [2021-06-05 14:36:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502446739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114977602] [2021-06-05 14:36:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:21,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114977602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:22,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971644271] [2021-06-05 14:36:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:22,145 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:22,446 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-06-05 14:36:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:22,447 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:36:22,448 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:36:22,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:36:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-06-05 14:36:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 14:36:22,452 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 14:36:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:22,452 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 14:36:22,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 14:36:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:22,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:22,453 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:22,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:22,653 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 509 times [2021-06-05 14:36:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:22,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74114421] [2021-06-05 14:36:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:22,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74114421] [2021-06-05 14:36:22,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74114421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443969992] [2021-06-05 14:36:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:22,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:22,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443969992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:22,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:22,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643279515] [2021-06-05 14:36:22,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:22,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:22,966 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:23,196 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-06-05 14:36:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:23,196 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:36:23,196 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:36:23,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:36:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-06-05 14:36:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 14:36:23,200 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 14:36:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:23,200 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 14:36:23,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 14:36:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:23,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:23,200 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-06-05 14:36:23,401 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 510 times [2021-06-05 14:36:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477592537] [2021-06-05 14:36:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477592537] [2021-06-05 14:36:23,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477592537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183558310] [2021-06-05 14:36:23,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:23,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183558310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446952484] [2021-06-05 14:36:23,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:23,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:23,703 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:23,986 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-06-05 14:36:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:23,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:23,987 INFO L225 Difference]: With dead ends: 568 [2021-06-05 14:36:23,987 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:36:23,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:36:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-06-05 14:36:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 14:36:23,991 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 14:36:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:23,992 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 14:36:23,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 14:36:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:23,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:23,992 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:24,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4515,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,192 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 511 times [2021-06-05 14:36:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:24,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531127535] [2021-06-05 14:36:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531127535] [2021-06-05 14:36:24,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531127535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218625036] [2021-06-05 14:36:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218625036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:24,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:24,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940614079] [2021-06-05 14:36:24,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:24,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:24,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:24,549 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:24,894 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-06-05 14:36:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:24,895 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:36:24,895 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:36:24,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:36:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-06-05 14:36:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 14:36:24,899 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 14:36:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:24,899 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 14:36:24,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 14:36:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:24,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:24,899 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:25,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4525,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:25,100 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 512 times [2021-06-05 14:36:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:25,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578499730] [2021-06-05 14:36:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:25,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578499730] [2021-06-05 14:36:25,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578499730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944341547] [2021-06-05 14:36:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:25,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944341547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:25,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:25,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5093132] [2021-06-05 14:36:25,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:25,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:25,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:25,414 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:25,647 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-06-05 14:36:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:25,648 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:36:25,648 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:36:25,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:36:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-06-05 14:36:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 14:36:25,652 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 14:36:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:25,652 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 14:36:25,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 14:36:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:25,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:25,652 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:25,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:25,869 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 513 times [2021-06-05 14:36:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:25,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903530082] [2021-06-05 14:36:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:25,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903530082] [2021-06-05 14:36:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903530082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870834376] [2021-06-05 14:36:25,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870834376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:26,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006159433] [2021-06-05 14:36:26,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:26,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:26,201 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:26,399 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-06-05 14:36:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:26,400 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:36:26,400 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 14:36:26,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 14:36:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-06-05 14:36:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 14:36:26,404 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 14:36:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:26,404 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 14:36:26,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 14:36:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:26,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:26,404 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:26,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,620 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 514 times [2021-06-05 14:36:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719672565] [2021-06-05 14:36:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:26,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719672565] [2021-06-05 14:36:26,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719672565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790910580] [2021-06-05 14:36:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:26,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790910580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:26,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:26,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902816459] [2021-06-05 14:36:26,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:26,974 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:27,401 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-06-05 14:36:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:27,411 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:36:27,411 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:36:27,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:36:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-06-05 14:36:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 14:36:27,415 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 14:36:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 14:36:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 14:36:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:27,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:27,416 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:27,616 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 515 times [2021-06-05 14:36:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522872441] [2021-06-05 14:36:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522872441] [2021-06-05 14:36:27,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522872441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085505572] [2021-06-05 14:36:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:27,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085505572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:27,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411620732] [2021-06-05 14:36:27,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:27,931 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:28,271 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-06-05 14:36:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:28,272 INFO L225 Difference]: With dead ends: 513 [2021-06-05 14:36:28,272 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:36:28,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:36:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-06-05 14:36:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 14:36:28,276 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 14:36:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:28,276 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 14:36:28,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 14:36:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:28,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:28,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,485 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 516 times [2021-06-05 14:36:28,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709250672] [2021-06-05 14:36:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709250672] [2021-06-05 14:36:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709250672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882856620] [2021-06-05 14:36:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882856620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:28,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:28,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596912714] [2021-06-05 14:36:28,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:28,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:28,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:28,790 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:29,078 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-06-05 14:36:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:29,079 INFO L225 Difference]: With dead ends: 453 [2021-06-05 14:36:29,079 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:36:29,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:36:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-06-05 14:36:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 14:36:29,082 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 14:36:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:29,082 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 14:36:29,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 14:36:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:29,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:29,082 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:29,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-06-05 14:36:29,287 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 517 times [2021-06-05 14:36:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:29,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262023004] [2021-06-05 14:36:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262023004] [2021-06-05 14:36:29,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262023004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697691668] [2021-06-05 14:36:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:29,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697691668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:29,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:29,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295392123] [2021-06-05 14:36:29,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:29,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:29,592 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:29,959 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-06-05 14:36:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:29,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:29,960 INFO L225 Difference]: With dead ends: 478 [2021-06-05 14:36:29,960 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:36:29,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:36:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-06-05 14:36:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 14:36:29,964 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 14:36:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:29,964 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 14:36:29,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 14:36:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:29,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:29,964 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:30,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-06-05 14:36:30,181 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 518 times [2021-06-05 14:36:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:30,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537763343] [2021-06-05 14:36:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537763343] [2021-06-05 14:36:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537763343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746638404] [2021-06-05 14:36:30,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:30,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746638404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:30,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768880831] [2021-06-05 14:36:30,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:30,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:30,501 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,707 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-06-05 14:36:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,707 INFO L225 Difference]: With dead ends: 449 [2021-06-05 14:36:30,708 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 14:36:30,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 14:36:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-06-05 14:36:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:36:30,711 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 14:36:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,711 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:36:30,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:36:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:30,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:30,711 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:30,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-05 14:36:30,912 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 519 times [2021-06-05 14:36:30,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:30,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087868794] [2021-06-05 14:36:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087868794] [2021-06-05 14:36:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087868794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411060041] [2021-06-05 14:36:30,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411060041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:31,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:31,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091282571] [2021-06-05 14:36:31,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:31,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:31,239 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:31,483 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-06-05 14:36:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:31,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:31,484 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:36:31,484 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:36:31,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:36:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-06-05 14:36:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 14:36:31,488 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 14:36:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:31,488 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 14:36:31,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 14:36:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:31,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:31,489 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:31,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4600,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,689 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 520 times [2021-06-05 14:36:31,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:31,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723687971] [2021-06-05 14:36:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:31,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723687971] [2021-06-05 14:36:31,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723687971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689907016] [2021-06-05 14:36:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:31,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689907016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:31,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:31,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950775644] [2021-06-05 14:36:31,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:31,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:31,967 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,183 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-06-05 14:36:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,184 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:36:32,184 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:36:32,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:36:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-06-05 14:36:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 14:36:32,188 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 14:36:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,188 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 14:36:32,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 14:36:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:32,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,188 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:32,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4609 [2021-06-05 14:36:32,389 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 521 times [2021-06-05 14:36:32,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:32,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135665307] [2021-06-05 14:36:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:32,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135665307] [2021-06-05 14:36:32,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135665307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320060001] [2021-06-05 14:36:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320060001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:32,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:32,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410073650] [2021-06-05 14:36:32,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:32,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:32,691 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,870 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-06-05 14:36:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,871 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:36:32,871 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 14:36:32,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 14:36:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-06-05 14:36:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 14:36:32,874 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 14:36:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,875 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 14:36:32,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 14:36:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:32,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,875 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4619,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,075 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 522 times [2021-06-05 14:36:33,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850656043] [2021-06-05 14:36:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850656043] [2021-06-05 14:36:33,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850656043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937827436] [2021-06-05 14:36:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937827436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:33,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:33,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028414590] [2021-06-05 14:36:33,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:33,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:33,391 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:33,579 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-06-05 14:36:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:33,580 INFO L225 Difference]: With dead ends: 547 [2021-06-05 14:36:33,580 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:36:33,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:36:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-06-05 14:36:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 14:36:33,584 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 14:36:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:33,584 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 14:36:33,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 14:36:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:33,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:33,585 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,785 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 523 times [2021-06-05 14:36:33,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395671068] [2021-06-05 14:36:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395671068] [2021-06-05 14:36:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395671068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497774450] [2021-06-05 14:36:33,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497774450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876450286] [2021-06-05 14:36:34,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:34,079 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,263 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-06-05 14:36:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,264 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:36:34,264 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:36:34,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:36:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-06-05 14:36:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 14:36:34,267 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 14:36:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 14:36:34,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 14:36:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:34,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,268 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:34,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-06-05 14:36:34,469 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 524 times [2021-06-05 14:36:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:34,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269531432] [2021-06-05 14:36:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269531432] [2021-06-05 14:36:34,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269531432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616075733] [2021-06-05 14:36:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:34,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:34,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616075733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:34,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802060518] [2021-06-05 14:36:34,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:34,781 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:35,081 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-06-05 14:36:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:35,082 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:36:35,082 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:36:35,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:36:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-06-05 14:36:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 14:36:35,086 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 14:36:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:35,086 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 14:36:35,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 14:36:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:35,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:35,087 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:35,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,303 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 525 times [2021-06-05 14:36:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:35,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585637857] [2021-06-05 14:36:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585637857] [2021-06-05 14:36:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585637857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704694496] [2021-06-05 14:36:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:35,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:35,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704694496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:35,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174440470] [2021-06-05 14:36:35,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:35,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:35,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:35,622 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:35,817 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-06-05 14:36:35,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:35,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:35,818 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:36:35,818 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:36:35,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:36:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-06-05 14:36:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 14:36:35,821 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 14:36:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:35,821 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 14:36:35,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 14:36:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:35,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:35,822 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-06-05 14:36:36,022 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 526 times [2021-06-05 14:36:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729294975] [2021-06-05 14:36:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729294975] [2021-06-05 14:36:36,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729294975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136281045] [2021-06-05 14:36:36,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136281045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:36,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282182148] [2021-06-05 14:36:36,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:36,321 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,529 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-06-05 14:36:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,530 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:36:36,530 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:36:36,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:36:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-06-05 14:36:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 14:36:36,534 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 14:36:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,534 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 14:36:36,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 14:36:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:36,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,534 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,751 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 527 times [2021-06-05 14:36:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081178008] [2021-06-05 14:36:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081178008] [2021-06-05 14:36:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081178008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565939759] [2021-06-05 14:36:36,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565939759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:37,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734948523] [2021-06-05 14:36:37,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:37,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:37,049 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,268 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-06-05 14:36:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:37,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,268 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:36:37,269 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:36:37,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:36:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-06-05 14:36:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 14:36:37,272 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 14:36:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,272 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 14:36:37,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 14:36:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:37,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,272 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,473 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 528 times [2021-06-05 14:36:37,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722328392] [2021-06-05 14:36:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722328392] [2021-06-05 14:36:37,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722328392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263782319] [2021-06-05 14:36:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263782319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:37,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997595584] [2021-06-05 14:36:37,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:37,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:37,775 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,962 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-06-05 14:36:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,963 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:36:37,963 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:36:37,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:36:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-06-05 14:36:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 14:36:37,967 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 14:36:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,967 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 14:36:37,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 14:36:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:37,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,967 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:38,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,168 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 529 times [2021-06-05 14:36:38,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:38,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422310927] [2021-06-05 14:36:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:38,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422310927] [2021-06-05 14:36:38,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422310927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454990427] [2021-06-05 14:36:38,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454990427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73181781] [2021-06-05 14:36:38,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:38,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:38,481 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:38,683 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-06-05 14:36:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:38,684 INFO L225 Difference]: With dead ends: 502 [2021-06-05 14:36:38,684 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:36:38,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:36:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-06-05 14:36:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 14:36:38,687 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 14:36:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:38,688 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 14:36:38,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 14:36:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:38,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:38,688 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:38,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,901 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 530 times [2021-06-05 14:36:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022874972] [2021-06-05 14:36:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022874972] [2021-06-05 14:36:38,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022874972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460576872] [2021-06-05 14:36:38,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460576872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:39,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513461654] [2021-06-05 14:36:39,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:39,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:39,199 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:39,395 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-06-05 14:36:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:39,396 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:36:39,396 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:36:39,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:36:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-06-05 14:36:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:36:39,399 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 14:36:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,399 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:36:39,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:36:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:39,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,399 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,616 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 531 times [2021-06-05 14:36:39,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472350526] [2021-06-05 14:36:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472350526] [2021-06-05 14:36:39,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472350526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843329083] [2021-06-05 14:36:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:36:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843329083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:39,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:39,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418103484] [2021-06-05 14:36:39,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:39,885 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,084 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-06-05 14:36:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,085 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:36:40,085 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:36:40,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:36:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-06-05 14:36:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 14:36:40,088 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 14:36:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,088 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 14:36:40,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 14:36:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:40,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,088 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:40,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4706,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,289 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 532 times [2021-06-05 14:36:40,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:40,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176663543] [2021-06-05 14:36:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176663543] [2021-06-05 14:36:40,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176663543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041599559] [2021-06-05 14:36:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041599559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:40,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621132334] [2021-06-05 14:36:40,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:40,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:40,555 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,783 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-06-05 14:36:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,784 INFO L225 Difference]: With dead ends: 468 [2021-06-05 14:36:40,784 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:36:40,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:36:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-06-05 14:36:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 14:36:40,788 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 14:36:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 14:36:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 14:36:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:40,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,788 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:40,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-06-05 14:36:40,989 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 533 times [2021-06-05 14:36:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:40,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399619852] [2021-06-05 14:36:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399619852] [2021-06-05 14:36:41,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399619852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455385300] [2021-06-05 14:36:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:41,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455385300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:41,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:41,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194220907] [2021-06-05 14:36:41,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:41,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:41,252 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:41,396 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-06-05 14:36:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:41,397 INFO L225 Difference]: With dead ends: 439 [2021-06-05 14:36:41,397 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:36:41,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:36:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-06-05 14:36:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 14:36:41,400 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 14:36:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:41,400 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 14:36:41,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 14:36:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:41,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:41,400 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:41,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-05 14:36:41,601 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 534 times [2021-06-05 14:36:41,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:41,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616908930] [2021-06-05 14:36:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616908930] [2021-06-05 14:36:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616908930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922629938] [2021-06-05 14:36:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:41,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922629938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:41,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874765434] [2021-06-05 14:36:41,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:41,857 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,012 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-06-05 14:36:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,013 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:36:42,013 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 14:36:42,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 14:36:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 14:36:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 14:36:42,017 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 14:36:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,017 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 14:36:42,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 14:36:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:42,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,017 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4724,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,218 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,218 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 535 times [2021-06-05 14:36:42,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906823001] [2021-06-05 14:36:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906823001] [2021-06-05 14:36:42,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906823001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957516766] [2021-06-05 14:36:42,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957516766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:42,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36633574] [2021-06-05 14:36:42,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:42,471 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,662 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-06-05 14:36:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,662 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:36:42,662 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 14:36:42,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 14:36:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-06-05 14:36:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 14:36:42,666 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 14:36:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,666 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 14:36:42,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 14:36:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:42,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,667 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4729 [2021-06-05 14:36:42,867 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 536 times [2021-06-05 14:36:42,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852571131] [2021-06-05 14:36:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852571131] [2021-06-05 14:36:42,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852571131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498314339] [2021-06-05 14:36:42,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498314339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:43,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267959524] [2021-06-05 14:36:43,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:43,139 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:43,285 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-06-05 14:36:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:43,286 INFO L225 Difference]: With dead ends: 449 [2021-06-05 14:36:43,286 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 14:36:43,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 14:36:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-06-05 14:36:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 14:36:43,289 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 14:36:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:43,289 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 14:36:43,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 14:36:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:43,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:43,290 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:43,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,490 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 537 times [2021-06-05 14:36:43,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:43,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137712850] [2021-06-05 14:36:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137712850] [2021-06-05 14:36:43,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137712850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617104404] [2021-06-05 14:36:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617104404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:43,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537245383] [2021-06-05 14:36:43,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:43,802 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:44,160 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-06-05 14:36:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:44,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:44,162 INFO L225 Difference]: With dead ends: 662 [2021-06-05 14:36:44,162 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 14:36:44,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 14:36:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-06-05 14:36:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.023026315789474) internal successors, (919), 304 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-06-05 14:36:44,166 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-06-05 14:36:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:44,166 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-06-05 14:36:44,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-06-05 14:36:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:44,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:44,167 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:44,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4738,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,367 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 538 times [2021-06-05 14:36:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:44,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284246155] [2021-06-05 14:36:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:44,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284246155] [2021-06-05 14:36:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284246155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349872886] [2021-06-05 14:36:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:44,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349872886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:44,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:44,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715173648] [2021-06-05 14:36:44,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:44,672 INFO L87 Difference]: Start difference. First operand 305 states and 919 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:44,902 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-06-05 14:36:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:44,903 INFO L225 Difference]: With dead ends: 616 [2021-06-05 14:36:44,903 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 14:36:44,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 14:36:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-06-05 14:36:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 14:36:44,907 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 14:36:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:44,907 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 14:36:44,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 14:36:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:44,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:44,907 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:45,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4747 [2021-06-05 14:36:45,108 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 539 times [2021-06-05 14:36:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385195906] [2021-06-05 14:36:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385195906] [2021-06-05 14:36:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385195906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302876710] [2021-06-05 14:36:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:45,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302876710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:45,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388279005] [2021-06-05 14:36:45,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:45,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:45,412 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:45,684 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-06-05 14:36:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:45,685 INFO L225 Difference]: With dead ends: 668 [2021-06-05 14:36:45,685 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 14:36:45,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 14:36:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-06-05 14:36:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0193548387096776) internal successors, (936), 310 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-06-05 14:36:45,689 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-06-05 14:36:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:45,689 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-06-05 14:36:45,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-06-05 14:36:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:45,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:45,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:45,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:45,890 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:45,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 540 times [2021-06-05 14:36:45,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:45,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730138230] [2021-06-05 14:36:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730138230] [2021-06-05 14:36:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730138230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921082027] [2021-06-05 14:36:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:46,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921082027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:46,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906310388] [2021-06-05 14:36:46,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:46,194 INFO L87 Difference]: Start difference. First operand 311 states and 936 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:46,448 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-06-05 14:36:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:46,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:46,449 INFO L225 Difference]: With dead ends: 631 [2021-06-05 14:36:46,449 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:36:46,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:36:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 14:36:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 14:36:46,453 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 14:36:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:46,453 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 14:36:46,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 14:36:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:46,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:46,454 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:46,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 14:36:46,654 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 541 times [2021-06-05 14:36:46,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:46,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067358192] [2021-06-05 14:36:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:46,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067358192] [2021-06-05 14:36:46,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067358192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983812759] [2021-06-05 14:36:46,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:46,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983812759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:46,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:46,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204361425] [2021-06-05 14:36:46,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:46,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:46,935 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:47,177 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-06-05 14:36:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:47,178 INFO L225 Difference]: With dead ends: 656 [2021-06-05 14:36:47,178 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 14:36:47,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 14:36:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-06-05 14:36:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 14:36:47,183 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 14:36:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:47,183 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 14:36:47,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 14:36:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:47,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:47,183 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:47,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:47,383 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 542 times [2021-06-05 14:36:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:47,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000368349] [2021-06-05 14:36:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000368349] [2021-06-05 14:36:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000368349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221371705] [2021-06-05 14:36:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:47,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221371705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:47,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754841379] [2021-06-05 14:36:47,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:47,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:47,665 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:47,995 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-06-05 14:36:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:47,996 INFO L225 Difference]: With dead ends: 662 [2021-06-05 14:36:47,996 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 14:36:47,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 14:36:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-06-05 14:36:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 14:36:48,000 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 14:36:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:48,000 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 14:36:48,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 14:36:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:48,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:48,001 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:48,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4789 [2021-06-05 14:36:48,201 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 543 times [2021-06-05 14:36:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554779412] [2021-06-05 14:36:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:48,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554779412] [2021-06-05 14:36:48,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554779412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444743070] [2021-06-05 14:36:48,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:48,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444743070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:48,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:48,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636919094] [2021-06-05 14:36:48,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:48,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:48,516 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:48,738 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-06-05 14:36:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:48,739 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:36:48,739 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 14:36:48,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 14:36:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-06-05 14:36:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.031847133757962) internal successors, (952), 314 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-06-05 14:36:48,743 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-06-05 14:36:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:48,744 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-06-05 14:36:48,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-06-05 14:36:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:48,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:48,744 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:48,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4802,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:48,944 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 544 times [2021-06-05 14:36:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:48,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448858610] [2021-06-05 14:36:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448858610] [2021-06-05 14:36:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448858610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804890223] [2021-06-05 14:36:49,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:49,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:49,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:49,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804890223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:49,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:49,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189234078] [2021-06-05 14:36:49,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:49,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:49,254 INFO L87 Difference]: Start difference. First operand 315 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:49,514 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-06-05 14:36:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:49,515 INFO L225 Difference]: With dead ends: 601 [2021-06-05 14:36:49,515 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 14:36:49,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 14:36:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-06-05 14:36:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-06-05 14:36:49,519 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-06-05 14:36:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:49,519 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-06-05 14:36:49,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-06-05 14:36:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:49,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:49,519 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:49,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4809 [2021-06-05 14:36:49,720 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 545 times [2021-06-05 14:36:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:49,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378995747] [2021-06-05 14:36:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:49,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378995747] [2021-06-05 14:36:49,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378995747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727645769] [2021-06-05 14:36:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:49,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727645769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:49,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:49,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699805118] [2021-06-05 14:36:49,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:49,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:49,999 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:50,224 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-06-05 14:36:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:50,225 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:36:50,225 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:36:50,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:36:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-06-05 14:36:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 14:36:50,229 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 14:36:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:50,229 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 14:36:50,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 14:36:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:50,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:50,229 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:50,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-06-05 14:36:50,430 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 546 times [2021-06-05 14:36:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552423050] [2021-06-05 14:36:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:50,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552423050] [2021-06-05 14:36:50,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552423050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799945096] [2021-06-05 14:36:50,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:50,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:50,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799945096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:50,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:50,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960267047] [2021-06-05 14:36:50,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:50,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:50,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:50,759 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:50,984 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-06-05 14:36:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:50,984 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:36:50,985 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 14:36:50,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 14:36:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-06-05 14:36:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.009493670886076) internal successors, (951), 316 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-06-05 14:36:50,989 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-06-05 14:36:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:50,989 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-06-05 14:36:50,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-06-05 14:36:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:50,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:50,989 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:51,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,189 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 547 times [2021-06-05 14:36:51,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:51,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767929111] [2021-06-05 14:36:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767929111] [2021-06-05 14:36:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767929111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903773575] [2021-06-05 14:36:51,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903773575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:51,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119259313] [2021-06-05 14:36:51,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:51,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:51,483 INFO L87 Difference]: Start difference. First operand 317 states and 951 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:51,748 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-06-05 14:36:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:51,749 INFO L225 Difference]: With dead ends: 601 [2021-06-05 14:36:51,749 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 14:36:51,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 14:36:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-06-05 14:36:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 14:36:51,753 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 14:36:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:51,754 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 14:36:51,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 14:36:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:51,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:51,754 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:51,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4834 [2021-06-05 14:36:51,965 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 548 times [2021-06-05 14:36:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:51,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579814401] [2021-06-05 14:36:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:52,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579814401] [2021-06-05 14:36:52,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579814401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047229239] [2021-06-05 14:36:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047229239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:52,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:52,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716377950] [2021-06-05 14:36:52,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:52,253 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:52,503 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-05 14:36:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:52,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:52,504 INFO L225 Difference]: With dead ends: 576 [2021-06-05 14:36:52,504 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:36:52,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:36:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-06-05 14:36:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0032362459546924) internal successors, (928), 309 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-06-05 14:36:52,508 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-06-05 14:36:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:52,508 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-06-05 14:36:52,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-06-05 14:36:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:52,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:52,508 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,709 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 549 times [2021-06-05 14:36:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:52,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485301015] [2021-06-05 14:36:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:52,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485301015] [2021-06-05 14:36:52,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485301015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944660891] [2021-06-05 14:36:52,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944660891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:52,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090556180] [2021-06-05 14:36:52,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:52,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:52,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:52,988 INFO L87 Difference]: Start difference. First operand 310 states and 928 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:53,197 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-06-05 14:36:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:53,198 INFO L225 Difference]: With dead ends: 600 [2021-06-05 14:36:53,198 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:36:53,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:36:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-06-05 14:36:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 14:36:53,202 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 14:36:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:53,202 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 14:36:53,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 14:36:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:53,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:53,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:53,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4847 [2021-06-05 14:36:53,402 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 550 times [2021-06-05 14:36:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:53,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636631169] [2021-06-05 14:36:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:53,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636631169] [2021-06-05 14:36:53,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636631169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611426553] [2021-06-05 14:36:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:53,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611426553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:53,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:53,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889850621] [2021-06-05 14:36:53,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:53,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:53,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:53,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:53,694 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:53,913 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-06-05 14:36:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:53,914 INFO L225 Difference]: With dead ends: 602 [2021-06-05 14:36:53,914 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 14:36:53,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 14:36:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-06-05 14:36:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.983818770226537) internal successors, (922), 309 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-06-05 14:36:53,918 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-06-05 14:36:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:53,918 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-06-05 14:36:53,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,918 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-06-05 14:36:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:53,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:53,918 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:54,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,119 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 551 times [2021-06-05 14:36:54,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:54,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693431542] [2021-06-05 14:36:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:54,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693431542] [2021-06-05 14:36:54,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693431542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044555577] [2021-06-05 14:36:54,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044555577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:54,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:36:54,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200509965] [2021-06-05 14:36:54,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:54,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:54,393 INFO L87 Difference]: Start difference. First operand 310 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:54,633 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-06-05 14:36:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:54,634 INFO L225 Difference]: With dead ends: 547 [2021-06-05 14:36:54,634 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:36:54,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:36:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-06-05 14:36:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 14:36:54,638 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 14:36:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:54,638 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 14:36:54,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 14:36:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:54,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:54,638 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:54,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,839 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 552 times [2021-06-05 14:36:54,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:54,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888524857] [2021-06-05 14:36:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:54,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888524857] [2021-06-05 14:36:54,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888524857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639291701] [2021-06-05 14:36:54,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639291701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:55,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:55,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70723682] [2021-06-05 14:36:55,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:55,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:55,092 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:55,321 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-06-05 14:36:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:55,322 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:36:55,322 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:36:55,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:36:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-06-05 14:36:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:36:55,326 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 14:36:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:55,326 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:36:55,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:36:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:55,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:55,327 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:55,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:55,527 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 553 times [2021-06-05 14:36:55,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:55,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787347265] [2021-06-05 14:36:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787347265] [2021-06-05 14:36:55,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787347265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012300810] [2021-06-05 14:36:55,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012300810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:55,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:55,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746057066] [2021-06-05 14:36:55,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:55,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:55,808 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:56,058 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-06-05 14:36:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:56,059 INFO L225 Difference]: With dead ends: 635 [2021-06-05 14:36:56,059 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 14:36:56,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 14:36:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-06-05 14:36:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9581993569131835) internal successors, (920), 311 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-06-05 14:36:56,063 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-06-05 14:36:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:56,063 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-06-05 14:36:56,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-06-05 14:36:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:56,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:56,064 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:56,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4872,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:56,264 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 554 times [2021-06-05 14:36:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:56,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078847827] [2021-06-05 14:36:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:56,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:56,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078847827] [2021-06-05 14:36:56,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078847827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:56,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303586904] [2021-06-05 14:36:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:56,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303586904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:56,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:56,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:56,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493510680] [2021-06-05 14:36:56,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:56,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:56,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:56,526 INFO L87 Difference]: Start difference. First operand 312 states and 920 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:56,833 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-06-05 14:36:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:56,834 INFO L225 Difference]: With dead ends: 641 [2021-06-05 14:36:56,834 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 14:36:56,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 14:36:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-06-05 14:36:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9611650485436893) internal successors, (915), 309 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-06-05 14:36:56,838 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-06-05 14:36:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:56,839 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-06-05 14:36:56,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-06-05 14:36:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:56,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:56,839 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:57,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4880,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,039 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:57,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 555 times [2021-06-05 14:36:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:57,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849193287] [2021-06-05 14:36:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:57,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849193287] [2021-06-05 14:36:57,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849193287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187288875] [2021-06-05 14:36:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187288875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:57,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294049706] [2021-06-05 14:36:57,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:57,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:57,303 INFO L87 Difference]: Start difference. First operand 310 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:57,541 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-06-05 14:36:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:57,542 INFO L225 Difference]: With dead ends: 624 [2021-06-05 14:36:57,542 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 14:36:57,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 14:36:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-06-05 14:36:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.964169381107492) internal successors, (910), 307 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-06-05 14:36:57,546 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-06-05 14:36:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:57,546 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-06-05 14:36:57,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-06-05 14:36:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:57,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:57,547 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:57,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,747 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 556 times [2021-06-05 14:36:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:57,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807872790] [2021-06-05 14:36:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807872790] [2021-06-05 14:36:57,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807872790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900811047] [2021-06-05 14:36:57,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:57,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900811047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:58,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:58,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057525035] [2021-06-05 14:36:58,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:58,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:58,003 INFO L87 Difference]: Start difference. First operand 308 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:58,225 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-06-05 14:36:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:58,226 INFO L225 Difference]: With dead ends: 649 [2021-06-05 14:36:58,226 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 14:36:58,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 14:36:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-06-05 14:36:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 14:36:58,230 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 14:36:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:58,230 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 14:36:58,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 14:36:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:58,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:58,231 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:58,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4894,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:58,431 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 557 times [2021-06-05 14:36:58,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:58,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237093163] [2021-06-05 14:36:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:58,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237093163] [2021-06-05 14:36:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237093163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81730138] [2021-06-05 14:36:58,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:58,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:58,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81730138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:58,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:58,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956699712] [2021-06-05 14:36:58,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:58,701 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:58,883 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-06-05 14:36:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:58,883 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:36:58,883 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 14:36:58,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 14:36:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-05 14:36:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 14:36:58,887 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 14:36:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:58,887 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 14:36:58,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 14:36:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:58,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:58,887 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:59,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,088 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 558 times [2021-06-05 14:36:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:59,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097337335] [2021-06-05 14:36:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:59,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097337335] [2021-06-05 14:36:59,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097337335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773967663] [2021-06-05 14:36:59,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:59,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773967663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:59,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:59,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414339013] [2021-06-05 14:36:59,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:59,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:59,332 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:59,564 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-06-05 14:36:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:59,565 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:36:59,565 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:36:59,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:36:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-06-05 14:36:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 14:36:59,569 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 14:36:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:59,569 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 14:36:59,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 14:36:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:59,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:59,569 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:59,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4907 [2021-06-05 14:36:59,786 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 559 times [2021-06-05 14:36:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:59,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858053621] [2021-06-05 14:36:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:59,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858053621] [2021-06-05 14:36:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858053621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360964406] [2021-06-05 14:36:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360964406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:00,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303253886] [2021-06-05 14:37:00,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:00,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:00,038 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:00,222 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-06-05 14:37:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:00,223 INFO L225 Difference]: With dead ends: 442 [2021-06-05 14:37:00,223 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 14:37:00,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 14:37:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-06-05 14:37:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 14:37:00,226 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 14:37:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:00,226 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 14:37:00,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 14:37:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:00,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:00,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:00,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4912 [2021-06-05 14:37:00,427 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 560 times [2021-06-05 14:37:00,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:00,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608191523] [2021-06-05 14:37:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608191523] [2021-06-05 14:37:00,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608191523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407499357] [2021-06-05 14:37:00,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:00,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407499357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:00,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107127994] [2021-06-05 14:37:00,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:00,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:00,662 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:00,835 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-06-05 14:37:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:00,836 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:37:00,836 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:37:00,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:37:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-06-05 14:37:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 14:37:00,839 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 14:37:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:00,840 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 14:37:00,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 14:37:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:00,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:00,840 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:01,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-06-05 14:37:01,040 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 561 times [2021-06-05 14:37:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:01,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242789664] [2021-06-05 14:37:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242789664] [2021-06-05 14:37:01,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242789664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137081762] [2021-06-05 14:37:01,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:01,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137081762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246827154] [2021-06-05 14:37:01,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:01,275 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:01,446 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-06-05 14:37:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:01,447 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:37:01,447 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:37:01,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:37:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-06-05 14:37:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 14:37:01,450 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 14:37:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:01,450 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 14:37:01,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 14:37:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:01,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:01,451 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:01,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 14:37:01,651 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 562 times [2021-06-05 14:37:01,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:01,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386358784] [2021-06-05 14:37:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:01,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386358784] [2021-06-05 14:37:01,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386358784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057958461] [2021-06-05 14:37:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:01,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:01,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057958461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:01,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385892221] [2021-06-05 14:37:01,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:01,888 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:02,040 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-06-05 14:37:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:02,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:02,041 INFO L225 Difference]: With dead ends: 452 [2021-06-05 14:37:02,041 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 14:37:02,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 14:37:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-06-05 14:37:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 14:37:02,044 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 14:37:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:02,044 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 14:37:02,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 14:37:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:02,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:02,045 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:02,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4927,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:02,245 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 563 times [2021-06-05 14:37:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993661416] [2021-06-05 14:37:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:02,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993661416] [2021-06-05 14:37:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993661416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319354966] [2021-06-05 14:37:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:02,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:02,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319354966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:02,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207596838] [2021-06-05 14:37:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:02,494 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:02,671 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-06-05 14:37:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:02,672 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:37:02,672 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:37:02,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:37:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-06-05 14:37:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.951923076923077) internal successors, (921), 312 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-06-05 14:37:02,676 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-06-05 14:37:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:02,676 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-06-05 14:37:02,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-06-05 14:37:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:02,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:02,677 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:02,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-05 14:37:02,877 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 564 times [2021-06-05 14:37:02,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:02,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414853876] [2021-06-05 14:37:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:02,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414853876] [2021-06-05 14:37:02,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414853876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676542628] [2021-06-05 14:37:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676542628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:03,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806466782] [2021-06-05 14:37:03,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:03,113 INFO L87 Difference]: Start difference. First operand 313 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:03,332 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-06-05 14:37:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:03,333 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:37:03,333 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:37:03,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:37:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-06-05 14:37:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 14:37:03,337 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-06-05 14:37:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:03,337 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 14:37:03,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 14:37:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:03,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:03,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:03,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4934,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,538 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:03,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 565 times [2021-06-05 14:37:03,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:03,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497831457] [2021-06-05 14:37:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:03,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497831457] [2021-06-05 14:37:03,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497831457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50591027] [2021-06-05 14:37:03,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50591027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:03,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:03,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530681430] [2021-06-05 14:37:03,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:03,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:03,769 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:03,940 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-06-05 14:37:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:03,941 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:37:03,941 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 14:37:03,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 14:37:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-06-05 14:37:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.957792207792208) internal successors, (911), 308 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-06-05 14:37:03,945 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-06-05 14:37:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:03,945 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-06-05 14:37:03,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-06-05 14:37:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:03,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:03,946 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:04,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4939 [2021-06-05 14:37:04,146 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 566 times [2021-06-05 14:37:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049433818] [2021-06-05 14:37:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:04,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049433818] [2021-06-05 14:37:04,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049433818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666045035] [2021-06-05 14:37:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666045035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:04,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:04,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549833085] [2021-06-05 14:37:04,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:04,361 INFO L87 Difference]: Start difference. First operand 309 states and 911 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:04,515 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-06-05 14:37:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:04,516 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:37:04,516 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:37:04,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:37:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-06-05 14:37:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 14:37:04,519 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 14:37:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:04,519 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 14:37:04,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 14:37:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:04,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:04,520 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:04,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4942 [2021-06-05 14:37:04,720 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 567 times [2021-06-05 14:37:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:04,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204102393] [2021-06-05 14:37:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:04,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204102393] [2021-06-05 14:37:04,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204102393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493459373] [2021-06-05 14:37:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:04,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493459373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:04,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:04,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179338475] [2021-06-05 14:37:04,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:04,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:04,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:04,941 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:05,161 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-06-05 14:37:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:05,162 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:37:05,162 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 14:37:05,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 14:37:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-06-05 14:37:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 14:37:05,166 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 14:37:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:05,166 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 14:37:05,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 14:37:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:05,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:05,166 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:05,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,367 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 568 times [2021-06-05 14:37:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:05,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030343497] [2021-06-05 14:37:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:05,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030343497] [2021-06-05 14:37:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030343497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016500436] [2021-06-05 14:37:05,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016500436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:05,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463444470] [2021-06-05 14:37:05,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:05,615 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:05,883 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-06-05 14:37:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:05,884 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:37:05,884 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:37:05,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:37:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-06-05 14:37:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 14:37:05,887 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 14:37:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:05,887 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 14:37:05,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 14:37:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:05,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:05,888 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:06,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4951 [2021-06-05 14:37:06,088 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:06,088 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 569 times [2021-06-05 14:37:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:06,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071859084] [2021-06-05 14:37:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071859084] [2021-06-05 14:37:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071859084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842344579] [2021-06-05 14:37:06,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:06,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842344579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:06,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:06,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228406453] [2021-06-05 14:37:06,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:06,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:06,342 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:06,731 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-06-05 14:37:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:06,732 INFO L225 Difference]: With dead ends: 512 [2021-06-05 14:37:06,732 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:37:06,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:37:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-06-05 14:37:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 14:37:06,736 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 14:37:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:06,736 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 14:37:06,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 14:37:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:06,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:06,736 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:06,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-06-05 14:37:06,937 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:06,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 570 times [2021-06-05 14:37:06,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:06,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716641161] [2021-06-05 14:37:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716641161] [2021-06-05 14:37:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716641161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960069049] [2021-06-05 14:37:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:07,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960069049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586823514] [2021-06-05 14:37:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:07,191 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:07,513 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 14:37:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:07,514 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:37:07,514 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 14:37:07,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 14:37:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-06-05 14:37:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 14:37:07,518 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 14:37:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:07,518 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 14:37:07,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 14:37:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:07,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:07,518 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:07,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:07,734 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:07,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 571 times [2021-06-05 14:37:07,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469807174] [2021-06-05 14:37:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469807174] [2021-06-05 14:37:07,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469807174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922423084] [2021-06-05 14:37:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:07,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922423084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:07,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:07,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114364286] [2021-06-05 14:37:07,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:07,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:07,986 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:08,226 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-06-05 14:37:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:08,227 INFO L225 Difference]: With dead ends: 432 [2021-06-05 14:37:08,227 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 14:37:08,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 14:37:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-06-05 14:37:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 14:37:08,230 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 14:37:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:08,230 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 14:37:08,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 14:37:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:08,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:08,230 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:08,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4967 [2021-06-05 14:37:08,431 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 572 times [2021-06-05 14:37:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:08,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894594120] [2021-06-05 14:37:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:08,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:08,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894594120] [2021-06-05 14:37:08,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894594120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:08,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099256574] [2021-06-05 14:37:08,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:08,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:08,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:08,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099256574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:08,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:08,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:08,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921993522] [2021-06-05 14:37:08,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:08,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:08,673 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:08,967 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-06-05 14:37:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:08,971 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:37:08,971 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:37:08,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:37:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-06-05 14:37:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 14:37:08,975 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 14:37:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:08,975 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 14:37:08,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 14:37:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:08,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:08,976 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:09,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,176 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:09,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 573 times [2021-06-05 14:37:09,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:09,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347710057] [2021-06-05 14:37:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347710057] [2021-06-05 14:37:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347710057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128065408] [2021-06-05 14:37:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128065408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:09,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018774012] [2021-06-05 14:37:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:09,424 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:09,643 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 14:37:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:09,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:09,644 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:37:09,644 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:37:09,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:37:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-06-05 14:37:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 14:37:09,648 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 14:37:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:09,648 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 14:37:09,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 14:37:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:09,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:09,648 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:09,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4981 [2021-06-05 14:37:09,849 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 574 times [2021-06-05 14:37:09,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:09,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427595830] [2021-06-05 14:37:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:09,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427595830] [2021-06-05 14:37:09,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427595830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652475610] [2021-06-05 14:37:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652475610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:10,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687931871] [2021-06-05 14:37:10,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:10,078 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:10,255 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-06-05 14:37:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:10,256 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:37:10,256 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:37:10,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:37:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-06-05 14:37:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 14:37:10,260 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 14:37:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:10,260 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 14:37:10,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 14:37:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:10,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:10,260 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:10,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,461 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:10,461 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 575 times [2021-06-05 14:37:10,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:10,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097218049] [2021-06-05 14:37:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:10,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097218049] [2021-06-05 14:37:10,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097218049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243089071] [2021-06-05 14:37:10,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243089071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:10,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:10,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265269201] [2021-06-05 14:37:10,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:10,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:10,678 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:10,891 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-06-05 14:37:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:10,891 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:37:10,891 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:37:10,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:37:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-06-05 14:37:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 14:37:10,895 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 14:37:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:10,895 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 14:37:10,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 14:37:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:10,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:10,896 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:11,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4991 [2021-06-05 14:37:11,096 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 576 times [2021-06-05 14:37:11,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:11,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843519620] [2021-06-05 14:37:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843519620] [2021-06-05 14:37:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843519620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886958063] [2021-06-05 14:37:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886958063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:11,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405929429] [2021-06-05 14:37:11,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:11,305 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:11,490 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-06-05 14:37:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:11,491 INFO L225 Difference]: With dead ends: 438 [2021-06-05 14:37:11,491 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:37:11,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:37:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-06-05 14:37:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 14:37:11,494 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 14:37:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:11,494 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 14:37:11,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 14:37:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:11,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:11,495 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:11,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4996,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,695 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 577 times [2021-06-05 14:37:11,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:11,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958390770] [2021-06-05 14:37:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958390770] [2021-06-05 14:37:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958390770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020881400] [2021-06-05 14:37:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020881400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:11,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:11,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029221296] [2021-06-05 14:37:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:11,923 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:12,123 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-06-05 14:37:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:12,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:12,123 INFO L225 Difference]: With dead ends: 422 [2021-06-05 14:37:12,123 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 14:37:12,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 14:37:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-06-05 14:37:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 14:37:12,126 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 14:37:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:12,126 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 14:37:12,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 14:37:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:12,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:12,127 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:12,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4998 [2021-06-05 14:37:12,327 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 578 times [2021-06-05 14:37:12,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:12,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120923254] [2021-06-05 14:37:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:12,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120923254] [2021-06-05 14:37:12,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120923254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225947235] [2021-06-05 14:37:12,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:12,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:12,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225947235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:12,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:12,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884145424] [2021-06-05 14:37:12,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:12,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:12,558 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:12,820 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-06-05 14:37:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:12,821 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:37:12,821 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:37:12,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:37:12,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-06-05 14:37:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 14:37:12,824 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 14:37:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:12,825 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 14:37:12,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 14:37:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:12,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:12,825 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:13,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,025 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 579 times [2021-06-05 14:37:13,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:13,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572144208] [2021-06-05 14:37:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:13,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572144208] [2021-06-05 14:37:13,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572144208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132614457] [2021-06-05 14:37:13,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132614457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:13,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:13,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788976501] [2021-06-05 14:37:13,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:13,250 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:13,447 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-06-05 14:37:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:13,448 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:37:13,448 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:37:13,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:37:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-06-05 14:37:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 14:37:13,451 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 14:37:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:13,451 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 14:37:13,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 14:37:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:13,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:13,452 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:13,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-06-05 14:37:13,652 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 580 times [2021-06-05 14:37:13,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:13,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942332192] [2021-06-05 14:37:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:13,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942332192] [2021-06-05 14:37:13,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942332192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601698196] [2021-06-05 14:37:13,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:13,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:13,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:13,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601698196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:13,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:13,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823522907] [2021-06-05 14:37:13,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:13,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:13,872 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:14,056 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-06-05 14:37:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:14,057 INFO L225 Difference]: With dead ends: 453 [2021-06-05 14:37:14,057 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:37:14,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:37:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-06-05 14:37:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 14:37:14,060 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 14:37:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:14,061 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 14:37:14,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 14:37:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:14,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:14,061 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:14,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5021 [2021-06-05 14:37:14,261 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 581 times [2021-06-05 14:37:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374088587] [2021-06-05 14:37:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374088587] [2021-06-05 14:37:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374088587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548406805] [2021-06-05 14:37:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:14,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548406805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:14,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33844429] [2021-06-05 14:37:14,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:14,483 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:14,692 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-06-05 14:37:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:14,693 INFO L225 Difference]: With dead ends: 453 [2021-06-05 14:37:14,693 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:37:14,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:37:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-06-05 14:37:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 14:37:14,696 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 14:37:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:14,696 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 14:37:14,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 14:37:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:14,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:14,697 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:14,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:14,897 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 582 times [2021-06-05 14:37:14,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:14,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752793077] [2021-06-05 14:37:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:14,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752793077] [2021-06-05 14:37:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752793077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329606085] [2021-06-05 14:37:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:15,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329606085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:15,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842984728] [2021-06-05 14:37:15,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:15,110 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:15,290 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 14:37:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:15,291 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:37:15,291 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:37:15,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:37:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-06-05 14:37:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 14:37:15,294 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 14:37:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:15,294 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 14:37:15,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 14:37:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:15,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:15,295 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:15,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5032 [2021-06-05 14:37:15,495 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 583 times [2021-06-05 14:37:15,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:15,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297505511] [2021-06-05 14:37:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:15,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297505511] [2021-06-05 14:37:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297505511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439095342] [2021-06-05 14:37:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:15,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439095342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:15,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:15,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433450642] [2021-06-05 14:37:15,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:15,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:15,708 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:15,929 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-06-05 14:37:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:15,929 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:37:15,929 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:37:15,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:37:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-06-05 14:37:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9456869009584663) internal successors, (922), 313 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-06-05 14:37:15,933 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-06-05 14:37:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:15,933 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-06-05 14:37:15,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-06-05 14:37:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:15,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:15,934 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:16,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-05 14:37:16,134 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 584 times [2021-06-05 14:37:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:16,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824011414] [2021-06-05 14:37:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:16,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824011414] [2021-06-05 14:37:16,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824011414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506721555] [2021-06-05 14:37:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506721555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:16,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:16,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123116113] [2021-06-05 14:37:16,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:16,353 INFO L87 Difference]: Start difference. First operand 314 states and 922 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:16,618 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-06-05 14:37:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:16,619 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:37:16,619 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 14:37:16,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 14:37:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-06-05 14:37:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 14:37:16,623 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-06-05 14:37:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:16,623 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 14:37:16,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 14:37:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:16,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:16,623 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:16,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,824 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 585 times [2021-06-05 14:37:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:16,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594082889] [2021-06-05 14:37:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:16,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594082889] [2021-06-05 14:37:16,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594082889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776769169] [2021-06-05 14:37:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776769169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:37:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448603014] [2021-06-05 14:37:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:17,038 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:17,236 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-06-05 14:37:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:17,237 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:37:17,237 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:37:17,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:37:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-06-05 14:37:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9514563106796117) internal successors, (912), 309 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-06-05 14:37:17,241 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-06-05 14:37:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:17,241 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-06-05 14:37:17,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-06-05 14:37:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:17,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:17,241 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:17,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5044,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:17,442 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 586 times [2021-06-05 14:37:17,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:17,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238669661] [2021-06-05 14:37:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238669661] [2021-06-05 14:37:17,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238669661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620482676] [2021-06-05 14:37:17,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:17,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:17,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620482676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:37:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342424248] [2021-06-05 14:37:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:17,643 INFO L87 Difference]: Start difference. First operand 310 states and 912 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:17,834 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 14:37:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:17,835 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:37:17,835 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 14:37:17,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 14:37:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-06-05 14:37:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 14:37:17,839 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 14:37:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:17,839 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 14:37:17,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 14:37:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:17,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:17,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:18,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 14:37:18,040 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2020715594, now seen corresponding path program 587 times [2021-06-05 14:37:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:18,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260444135] [2021-06-05 14:37:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260444135] [2021-06-05 14:37:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260444135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036253380] [2021-06-05 14:37:18,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:18,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:18,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:18,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:18,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:18,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:18,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,759 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-06-05 14:37:18,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:18,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:18,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:18,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:18,793 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 14:37:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036253380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:18,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:37:18,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15899844] [2021-06-05 14:37:18,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:18,927 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,260 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-06-05 14:37:20,513 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 14:37:20,715 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-05 14:37:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:21,022 INFO L93 Difference]: Finished difference Result 742 states and 2196 transitions. [2021-06-05 14:37:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:37:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:21,023 INFO L225 Difference]: With dead ends: 742 [2021-06-05 14:37:21,023 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 14:37:21,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1879.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:37:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 14:37:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 354. [2021-06-05 14:37:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.997167138810198) internal successors, (1058), 353 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2021-06-05 14:37:21,028 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 21 [2021-06-05 14:37:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:21,028 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2021-06-05 14:37:21,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2021-06-05 14:37:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:21,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:21,028 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:21,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,228 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1242995883, now seen corresponding path program 1 times [2021-06-05 14:37:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:21,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820223940] [2021-06-05 14:37:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:21,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820223940] [2021-06-05 14:37:21,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820223940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971008483] [2021-06-05 14:37:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:21,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:21,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:21,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:21,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:21,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,505 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 14:37:21,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:21,505 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 14:37:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:21,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971008483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:21,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:21,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798155866] [2021-06-05 14:37:21,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:21,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:21,540 INFO L87 Difference]: Start difference. First operand 354 states and 1058 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:22,716 INFO L93 Difference]: Finished difference Result 803 states and 2292 transitions. [2021-06-05 14:37:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:37:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:22,717 INFO L225 Difference]: With dead ends: 803 [2021-06-05 14:37:22,718 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 14:37:22,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 14:37:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 417. [2021-06-05 14:37:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.045673076923077) internal successors, (1267), 416 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1267 transitions. [2021-06-05 14:37:22,723 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1267 transitions. Word has length 21 [2021-06-05 14:37:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:22,723 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1267 transitions. [2021-06-05 14:37:22,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1267 transitions. [2021-06-05 14:37:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:22,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:22,723 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:22,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5101 [2021-06-05 14:37:22,937 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 315215179, now seen corresponding path program 2 times [2021-06-05 14:37:22,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:22,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518775850] [2021-06-05 14:37:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:23,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518775850] [2021-06-05 14:37:23,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518775850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488705908] [2021-06-05 14:37:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:23,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:23,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:23,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:23,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:23,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:23,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,210 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 14:37:23,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:23,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 14:37:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488705908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154040090] [2021-06-05 14:37:23,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:23,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:23,250 INFO L87 Difference]: Start difference. First operand 417 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:24,438 INFO L93 Difference]: Finished difference Result 1000 states and 2902 transitions. [2021-06-05 14:37:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:37:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:24,440 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 14:37:24,440 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 14:37:24,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 14:37:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 434. [2021-06-05 14:37:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.0600461893764432) internal successors, (1325), 433 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1325 transitions. [2021-06-05 14:37:24,446 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1325 transitions. Word has length 21 [2021-06-05 14:37:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1325 transitions. [2021-06-05 14:37:24,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1325 transitions. [2021-06-05 14:37:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:24,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:24,446 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:24,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5106,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:24,647 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1023573397, now seen corresponding path program 3 times [2021-06-05 14:37:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:24,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526378565] [2021-06-05 14:37:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:24,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526378565] [2021-06-05 14:37:24,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526378565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175520253] [2021-06-05 14:37:24,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:24,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:24,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:24,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:24,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:24,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:24,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:24,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:24,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:24,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,956 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 14:37:24,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:24,957 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-06-05 14:37:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:25,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175520253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:25,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:25,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011887555] [2021-06-05 14:37:25,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:25,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:25,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:25,029 INFO L87 Difference]: Start difference. First operand 434 states and 1325 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:26,552 INFO L93 Difference]: Finished difference Result 1044 states and 2937 transitions. [2021-06-05 14:37:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:37:26,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:26,553 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 14:37:26,553 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 14:37:26,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1062.4ms TimeCoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:37:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 14:37:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 436. [2021-06-05 14:37:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.0965517241379312) internal successors, (1347), 435 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1347 transitions. [2021-06-05 14:37:26,559 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1347 transitions. Word has length 21 [2021-06-05 14:37:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:26,559 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1347 transitions. [2021-06-05 14:37:26,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1347 transitions. [2021-06-05 14:37:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:26,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:26,560 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:26,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5113 [2021-06-05 14:37:26,760 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash -127683961, now seen corresponding path program 4 times [2021-06-05 14:37:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:26,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387337558] [2021-06-05 14:37:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:26,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387337558] [2021-06-05 14:37:26,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387337558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742686233] [2021-06-05 14:37:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:26,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:27,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:27,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:27,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,039 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 14:37:27,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:27,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 14:37:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:27,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742686233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:27,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:27,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759948031] [2021-06-05 14:37:27,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:27,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:27,075 INFO L87 Difference]: Start difference. First operand 436 states and 1347 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:28,143 INFO L93 Difference]: Finished difference Result 887 states and 2629 transitions. [2021-06-05 14:37:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:37:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:28,144 INFO L225 Difference]: With dead ends: 887 [2021-06-05 14:37:28,144 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 14:37:28,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:37:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 14:37:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-06-05 14:37:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.128755364806867) internal successors, (1458), 466 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-06-05 14:37:28,150 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-06-05 14:37:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:28,150 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-06-05 14:37:28,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-06-05 14:37:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:28,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:28,150 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:28,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-06-05 14:37:28,351 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash 580674257, now seen corresponding path program 5 times [2021-06-05 14:37:28,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:28,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804175468] [2021-06-05 14:37:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:28,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804175468] [2021-06-05 14:37:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804175468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801155698] [2021-06-05 14:37:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:28,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:28,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:28,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:28,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:28,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:28,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:28,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:28,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:28,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:28,648 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:37:28,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:28,649 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:37:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801155698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:28,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:28,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634692068] [2021-06-05 14:37:28,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:28,723 INFO L87 Difference]: Start difference. First operand 467 states and 1458 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,035 INFO L93 Difference]: Finished difference Result 1114 states and 3228 transitions. [2021-06-05 14:37:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:37:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,036 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:37:30,036 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 14:37:30,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 865.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 14:37:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 450. [2021-06-05 14:37:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.111358574610245) internal successors, (1397), 449 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1397 transitions. [2021-06-05 14:37:30,042 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1397 transitions. Word has length 21 [2021-06-05 14:37:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,042 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1397 transitions. [2021-06-05 14:37:30,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1397 transitions. [2021-06-05 14:37:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:30,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,043 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5127 [2021-06-05 14:37:30,243 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1526109863, now seen corresponding path program 6 times [2021-06-05 14:37:30,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250656634] [2021-06-05 14:37:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250656634] [2021-06-05 14:37:30,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250656634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019859225] [2021-06-05 14:37:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:30,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:30,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:30,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:30,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:30,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:30,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:30,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:30,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,561 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:37:30,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:30,562 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:37:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:30,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019859225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:30,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:30,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702505368] [2021-06-05 14:37:30,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:30,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:30,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:30,630 INFO L87 Difference]: Start difference. First operand 450 states and 1397 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,111 INFO L93 Difference]: Finished difference Result 983 states and 2836 transitions. [2021-06-05 14:37:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:37:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,113 INFO L225 Difference]: With dead ends: 983 [2021-06-05 14:37:32,113 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 14:37:32,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1039.0ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:37:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 14:37:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 456. [2021-06-05 14:37:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1406593406593406) internal successors, (1429), 455 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1429 transitions. [2021-06-05 14:37:32,118 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1429 transitions. Word has length 21 [2021-06-05 14:37:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,118 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1429 transitions. [2021-06-05 14:37:32,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1429 transitions. [2021-06-05 14:37:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:32,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,119 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,319 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1817626865, now seen corresponding path program 7 times [2021-06-05 14:37:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583486412] [2021-06-05 14:37:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583486412] [2021-06-05 14:37:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583486412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464857902] [2021-06-05 14:37:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:32,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:32,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:32,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,592 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 14:37:32,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:32,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 14:37:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:32,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464857902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:32,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:32,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100873407] [2021-06-05 14:37:32,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:32,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:32,630 INFO L87 Difference]: Start difference. First operand 456 states and 1429 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,742 INFO L93 Difference]: Finished difference Result 962 states and 2828 transitions. [2021-06-05 14:37:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:37:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,743 INFO L225 Difference]: With dead ends: 962 [2021-06-05 14:37:33,743 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 14:37:33,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:37:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 14:37:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2021-06-05 14:37:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.149159663865546) internal successors, (1499), 476 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-06-05 14:37:33,749 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-06-05 14:37:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,749 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-06-05 14:37:33,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-06-05 14:37:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:33,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,750 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5144 [2021-06-05 14:37:33,950 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1109268647, now seen corresponding path program 8 times [2021-06-05 14:37:33,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725987907] [2021-06-05 14:37:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725987907] [2021-06-05 14:37:34,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725987907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775946744] [2021-06-05 14:37:34,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:34,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:34,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:34,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:34,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:34,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:34,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:34,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:34,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:34,249 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:37:34,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:34,249 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:37:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775946744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:34,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:34,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483786755] [2021-06-05 14:37:34,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:34,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:34,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:34,318 INFO L87 Difference]: Start difference. First operand 477 states and 1499 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:35,635 INFO L93 Difference]: Finished difference Result 1189 states and 3427 transitions. [2021-06-05 14:37:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:37:35,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:35,637 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 14:37:35,637 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 14:37:35,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 14:37:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 460. [2021-06-05 14:37:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.132897603485839) internal successors, (1438), 459 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1438 transitions. [2021-06-05 14:37:35,644 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1438 transitions. Word has length 21 [2021-06-05 14:37:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:35,644 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1438 transitions. [2021-06-05 14:37:35,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1438 transitions. [2021-06-05 14:37:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:35,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:35,644 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:35,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5151,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:35,857 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1078914529, now seen corresponding path program 9 times [2021-06-05 14:37:35,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:35,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662245695] [2021-06-05 14:37:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:35,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662245695] [2021-06-05 14:37:35,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662245695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155503711] [2021-06-05 14:37:35,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:36,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:36,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:37:36,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,173 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-06-05 14:37:36,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:36,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-06-05 14:37:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:37:36,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155503711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:36,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:37:36,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868130685] [2021-06-05 14:37:36,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:36,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:36,222 INFO L87 Difference]: Start difference. First operand 460 states and 1438 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:37,158 INFO L93 Difference]: Finished difference Result 758 states and 2219 transitions. [2021-06-05 14:37:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:37,159 INFO L225 Difference]: With dead ends: 758 [2021-06-05 14:37:37,159 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 14:37:37,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 14:37:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 472. [2021-06-05 14:37:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.1146496815286624) internal successors, (1467), 471 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1467 transitions. [2021-06-05 14:37:37,164 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1467 transitions. Word has length 21 [2021-06-05 14:37:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:37,164 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1467 transitions. [2021-06-05 14:37:37,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1467 transitions. [2021-06-05 14:37:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:37,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:37,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:37,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-06-05 14:37:37,365 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1157086666, now seen corresponding path program 588 times [2021-06-05 14:37:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:37,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492251287] [2021-06-05 14:37:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492251287] [2021-06-05 14:37:37,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492251287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962270993] [2021-06-05 14:37:37,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:37:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:37,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:37:37,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:37,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:37,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:37,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:37,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:37,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:37,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:37:37,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:37,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:37,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:37:37,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,021 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-06-05 14:37:38,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:38,022 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-06-05 14:37:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:38,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962270993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:38,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:38,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759340115] [2021-06-05 14:37:38,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:38,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:38,101 INFO L87 Difference]: Start difference. First operand 472 states and 1467 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,432 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 14:37:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:38,809 INFO L93 Difference]: Finished difference Result 764 states and 2359 transitions. [2021-06-05 14:37:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:38,810 INFO L225 Difference]: With dead ends: 764 [2021-06-05 14:37:38,810 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 14:37:38,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 14:37:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 490. [2021-06-05 14:37:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.147239263803681) internal successors, (1539), 489 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1539 transitions. [2021-06-05 14:37:38,816 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1539 transitions. Word has length 21 [2021-06-05 14:37:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:38,816 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1539 transitions. [2021-06-05 14:37:38,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1539 transitions. [2021-06-05 14:37:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:38,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:38,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:39,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5171 [2021-06-05 14:37:39,017 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401856, now seen corresponding path program 589 times [2021-06-05 14:37:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:39,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533493921] [2021-06-05 14:37:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:39,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533493921] [2021-06-05 14:37:39,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533493921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364275118] [2021-06-05 14:37:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:39,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:39,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:39,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:39,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:39,657 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:39,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:39,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:39,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-06-05 14:37:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364275118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:37:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45571297] [2021-06-05 14:37:39,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:39,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:39,823 INFO L87 Difference]: Start difference. First operand 490 states and 1539 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:40,938 INFO L93 Difference]: Finished difference Result 834 states and 2548 transitions. [2021-06-05 14:37:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:40,940 INFO L225 Difference]: With dead ends: 834 [2021-06-05 14:37:40,940 INFO L226 Difference]: Without dead ends: 765 [2021-06-05 14:37:40,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1015.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-05 14:37:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 497. [2021-06-05 14:37:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.163306451612903) internal successors, (1569), 496 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1569 transitions. [2021-06-05 14:37:40,946 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1569 transitions. Word has length 21 [2021-06-05 14:37:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:40,946 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1569 transitions. [2021-06-05 14:37:40,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1569 transitions. [2021-06-05 14:37:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:40,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:40,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:41,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-05 14:37:41,147 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash -777988342, now seen corresponding path program 590 times [2021-06-05 14:37:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:41,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409480990] [2021-06-05 14:37:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:41,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409480990] [2021-06-05 14:37:41,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409480990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693939170] [2021-06-05 14:37:41,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:37:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:41,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:37:41,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:37:41,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:41,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:41,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:41,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:41,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:41,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:41,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:41,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:37:41,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,988 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 14:37:41,989 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-06-05 14:37:41,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:37:41,993 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 14:37:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693939170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:42,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:37:42,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460642009] [2021-06-05 14:37:42,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:42,184 INFO L87 Difference]: Start difference. First operand 497 states and 1569 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,757 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 14:37:42,948 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 14:37:43,135 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 14:37:43,321 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-05 14:37:43,507 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:37:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:43,578 INFO L93 Difference]: Finished difference Result 823 states and 2486 transitions. [2021-06-05 14:37:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:43,579 INFO L225 Difference]: With dead ends: 823 [2021-06-05 14:37:43,579 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 14:37:43,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1387.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 14:37:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 482. [2021-06-05 14:37:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.126819126819127) internal successors, (1504), 481 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1504 transitions. [2021-06-05 14:37:43,585 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1504 transitions. Word has length 21 [2021-06-05 14:37:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:43,585 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1504 transitions. [2021-06-05 14:37:43,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1504 transitions. [2021-06-05 14:37:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:43,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:43,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:43,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5274,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:43,786 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1120947862, now seen corresponding path program 591 times [2021-06-05 14:37:43,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:43,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815793686] [2021-06-05 14:37:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815793686] [2021-06-05 14:37:43,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815793686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573015986] [2021-06-05 14:37:43,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:44,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:44,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:37:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:44,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:37:44,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:44,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:44,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:44,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:37:44,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:44,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:37:44,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:44,338 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:44,341 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:44,418 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.2 percent of original size [2021-06-05 14:37:44,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:44,421 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 14:37:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573015986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:44,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:37:44,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134735919] [2021-06-05 14:37:44,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:44,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:44,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:44,495 INFO L87 Difference]: Start difference. First operand 482 states and 1504 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:45,080 INFO L93 Difference]: Finished difference Result 767 states and 2356 transitions. [2021-06-05 14:37:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:45,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:45,081 INFO L225 Difference]: With dead ends: 767 [2021-06-05 14:37:45,081 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 14:37:45,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 14:37:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 498. [2021-06-05 14:37:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.1569416498993963) internal successors, (1569), 497 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1569 transitions. [2021-06-05 14:37:45,087 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1569 transitions. Word has length 21 [2021-06-05 14:37:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:45,087 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1569 transitions. [2021-06-05 14:37:45,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1569 transitions. [2021-06-05 14:37:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:45,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:45,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:45,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5349 [2021-06-05 14:37:45,288 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 697629236, now seen corresponding path program 592 times [2021-06-05 14:37:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:45,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026091262] [2021-06-05 14:37:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:45,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026091262] [2021-06-05 14:37:45,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026091262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836772084] [2021-06-05 14:37:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:45,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:37:45,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:45,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:45,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:45,893 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:45,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:45,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:45,904 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:45,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:45,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:45,963 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 14:37:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836772084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:46,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:37:46,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199814937] [2021-06-05 14:37:46,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:46,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:46,160 INFO L87 Difference]: Start difference. First operand 498 states and 1569 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,161 INFO L93 Difference]: Finished difference Result 811 states and 2461 transitions. [2021-06-05 14:37:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,162 INFO L225 Difference]: With dead ends: 811 [2021-06-05 14:37:47,162 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:37:47,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 999.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:37:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 491. [2021-06-05 14:37:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1408163265306124) internal successors, (1539), 490 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1539 transitions. [2021-06-05 14:37:47,168 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1539 transitions. Word has length 21 [2021-06-05 14:37:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,168 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1539 transitions. [2021-06-05 14:37:47,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1539 transitions. [2021-06-05 14:37:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:47,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:47,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5391,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,375 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash -363148854, now seen corresponding path program 593 times [2021-06-05 14:37:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:47,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716278467] [2021-06-05 14:37:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:47,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716278467] [2021-06-05 14:37:47,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716278467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102536124] [2021-06-05 14:37:47,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:47,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:47,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:47,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:47,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:47,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:37:47,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:47,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:37:47,961 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:37:47,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:47,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:47,973 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:47,977 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:47,981 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:47,984 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:47,988 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:47,993 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:47,995 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,075 INFO L628 ElimStorePlain]: treesize reduction 146, result has 41.1 percent of original size [2021-06-05 14:37:48,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:48,076 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:677, output treesize:70 [2021-06-05 14:37:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102536124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:48,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:37:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279136575] [2021-06-05 14:37:48,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:48,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:48,244 INFO L87 Difference]: Start difference. First operand 491 states and 1539 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,536 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-06-05 14:37:48,948 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 14:37:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:49,121 INFO L93 Difference]: Finished difference Result 931 states and 2746 transitions. [2021-06-05 14:37:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:49,123 INFO L225 Difference]: With dead ends: 931 [2021-06-05 14:37:49,123 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 14:37:49,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 910.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 14:37:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 515. [2021-06-05 14:37:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.2023346303501947) internal successors, (1646), 514 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1646 transitions. [2021-06-05 14:37:49,129 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1646 transitions. Word has length 21 [2021-06-05 14:37:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:49,129 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1646 transitions. [2021-06-05 14:37:49,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1646 transitions. [2021-06-05 14:37:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:49,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:49,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:49,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5465 [2021-06-05 14:37:49,330 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1269902538, now seen corresponding path program 594 times [2021-06-05 14:37:49,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:49,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568285634] [2021-06-05 14:37:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568285634] [2021-06-05 14:37:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568285634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69686462] [2021-06-05 14:37:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:49,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:49,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:49,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:49,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:37:49,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:49,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:37:49,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:37:49,720 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,728 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:49,730 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,786 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.8 percent of original size [2021-06-05 14:37:49,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:49,787 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-06-05 14:37:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69686462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:49,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:37:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380843209] [2021-06-05 14:37:49,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:37:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:37:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:49,912 INFO L87 Difference]: Start difference. First operand 515 states and 1646 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,298 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 14:37:50,591 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 14:37:50,742 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 14:37:50,879 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:37:51,036 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 14:37:51,161 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-05 14:37:51,425 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 14:37:51,557 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:37:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,568 INFO L93 Difference]: Finished difference Result 1021 states and 2942 transitions. [2021-06-05 14:37:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,569 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 14:37:51,569 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 14:37:51,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1587.7ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:37:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 14:37:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 510. [2021-06-05 14:37:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.180746561886051) internal successors, (1619), 509 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1619 transitions. [2021-06-05 14:37:51,576 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1619 transitions. Word has length 21 [2021-06-05 14:37:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,576 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1619 transitions. [2021-06-05 14:37:51,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1619 transitions. [2021-06-05 14:37:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:51,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,777 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1917789974, now seen corresponding path program 595 times [2021-06-05 14:37:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619154166] [2021-06-05 14:37:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619154166] [2021-06-05 14:37:51,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619154166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211194898] [2021-06-05 14:37:51,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:37:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:52,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:52,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:52,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:52,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:52,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,220 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 14:37:52,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:52,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 14:37:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211194898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:52,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:37:52,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673584220] [2021-06-05 14:37:52,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:37:52,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:52,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:37:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:52,280 INFO L87 Difference]: Start difference. First operand 510 states and 1619 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:53,021 INFO L93 Difference]: Finished difference Result 875 states and 2605 transitions. [2021-06-05 14:37:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:53,022 INFO L225 Difference]: With dead ends: 875 [2021-06-05 14:37:53,022 INFO L226 Difference]: Without dead ends: 806 [2021-06-05 14:37:53,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:37:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-05 14:37:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 514. [2021-06-05 14:37:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1832358674463936) internal successors, (1633), 513 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1633 transitions. [2021-06-05 14:37:53,028 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1633 transitions. Word has length 21 [2021-06-05 14:37:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1633 transitions. [2021-06-05 14:37:53,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1633 transitions. [2021-06-05 14:37:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:53,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:53,029 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:53,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5598,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,229 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1093182143, now seen corresponding path program 10 times [2021-06-05 14:37:53,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:53,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391291585] [2021-06-05 14:37:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391291585] [2021-06-05 14:37:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391291585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315263654] [2021-06-05 14:37:53,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:53,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:53,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:53,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:53,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:53,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,549 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 14:37:53,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:53,550 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 14:37:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315263654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:53,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:53,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133860820] [2021-06-05 14:37:53,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:53,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:53,618 INFO L87 Difference]: Start difference. First operand 514 states and 1633 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,034 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 14:37:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:55,496 INFO L93 Difference]: Finished difference Result 1303 states and 3840 transitions. [2021-06-05 14:37:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:37:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:55,497 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 14:37:55,497 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 14:37:55,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1476.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:37:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 14:37:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 554. [2021-06-05 14:37:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2278481012658227) internal successors, (1785), 553 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 14:37:55,505 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 14:37:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:55,505 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 14:37:55,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 14:37:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:55,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:55,506 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:55,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:55,706 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1361928571, now seen corresponding path program 11 times [2021-06-05 14:37:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853674282] [2021-06-05 14:37:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853674282] [2021-06-05 14:37:55,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853674282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314316957] [2021-06-05 14:37:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:55,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:55,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:37:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:55,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:55,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:55,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:55,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:55,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:55,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:55,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:56,023 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 14:37:56,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:56,023 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 14:37:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314316957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:56,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238201459] [2021-06-05 14:37:56,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:56,095 INFO L87 Difference]: Start difference. First operand 554 states and 1785 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:57,492 INFO L93 Difference]: Finished difference Result 1175 states and 3509 transitions. [2021-06-05 14:37:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:37:57,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:57,494 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 14:37:57,494 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 14:37:57,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1007.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:37:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 14:37:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 554. [2021-06-05 14:37:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2278481012658227) internal successors, (1785), 553 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 14:37:57,501 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 14:37:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:57,501 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 14:37:57,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 14:37:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:57,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:57,501 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:57,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5620,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,702 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1696858245, now seen corresponding path program 12 times [2021-06-05 14:37:57,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:57,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882694827] [2021-06-05 14:37:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:57,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882694827] [2021-06-05 14:37:57,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882694827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972321800] [2021-06-05 14:37:57,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:57,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:57,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:57,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:57,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:57,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:57,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:57,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:58,000 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,033 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 14:37:58,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:37:58,034 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 14:37:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972321800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:58,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:58,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800803212] [2021-06-05 14:37:58,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:58,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:58,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:58,099 INFO L87 Difference]: Start difference. First operand 554 states and 1785 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:59,791 INFO L93 Difference]: Finished difference Result 1201 states and 3525 transitions. [2021-06-05 14:37:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:37:59,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:37:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:59,792 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 14:37:59,792 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 14:37:59,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1325.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:37:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 14:37:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 561. [2021-06-05 14:37:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.2160714285714285) internal successors, (1801), 560 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1801 transitions. [2021-06-05 14:37:59,804 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1801 transitions. Word has length 21 [2021-06-05 14:37:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:59,804 INFO L482 AbstractCegarLoop]: Abstraction has 561 states and 1801 transitions. [2021-06-05 14:37:59,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1801 transitions. [2021-06-05 14:37:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:59,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:59,805 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:00,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,021 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 219055557, now seen corresponding path program 13 times [2021-06-05 14:38:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:00,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829041431] [2021-06-05 14:38:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:00,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829041431] [2021-06-05 14:38:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829041431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468825317] [2021-06-05 14:38:00,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468825317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:00,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112375406] [2021-06-05 14:38:00,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:00,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:00,346 INFO L87 Difference]: Start difference. First operand 561 states and 1801 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:01,774 INFO L93 Difference]: Finished difference Result 1086 states and 3218 transitions. [2021-06-05 14:38:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:38:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:01,775 INFO L225 Difference]: With dead ends: 1086 [2021-06-05 14:38:01,775 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 14:38:01,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:38:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 14:38:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 564. [2021-06-05 14:38:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.202486678507993) internal successors, (1803), 563 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1803 transitions. [2021-06-05 14:38:01,782 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1803 transitions. Word has length 21 [2021-06-05 14:38:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:01,782 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1803 transitions. [2021-06-05 14:38:01,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1803 transitions. [2021-06-05 14:38:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:01,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:01,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:01,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,983 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1157506963, now seen corresponding path program 14 times [2021-06-05 14:38:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:01,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907111325] [2021-06-05 14:38:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:02,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907111325] [2021-06-05 14:38:02,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907111325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451920832] [2021-06-05 14:38:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:02,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:02,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:02,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:02,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:02,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:02,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:02,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:02,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:02,293 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 14:38:02,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:02,294 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 14:38:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451920832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:02,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095809788] [2021-06-05 14:38:02,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:02,363 INFO L87 Difference]: Start difference. First operand 564 states and 1803 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:03,709 INFO L93 Difference]: Finished difference Result 1381 states and 4019 transitions. [2021-06-05 14:38:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:38:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:03,711 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 14:38:03,711 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 14:38:03,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:38:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 14:38:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2021-06-05 14:38:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.2189141856392296) internal successors, (1838), 571 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1838 transitions. [2021-06-05 14:38:03,719 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1838 transitions. Word has length 21 [2021-06-05 14:38:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:03,719 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1838 transitions. [2021-06-05 14:38:03,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1838 transitions. [2021-06-05 14:38:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:03,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:03,719 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:03,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5646 [2021-06-05 14:38:03,929 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash -171190457, now seen corresponding path program 15 times [2021-06-05 14:38:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:03,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106717975] [2021-06-05 14:38:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106717975] [2021-06-05 14:38:04,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106717975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427520042] [2021-06-05 14:38:04,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:04,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:38:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:04,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:04,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:04,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:04,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:04,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:04,299 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 14:38:04,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:04,300 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:84, output treesize:41 [2021-06-05 14:38:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:38:04,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427520042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:04,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:38:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645173128] [2021-06-05 14:38:04,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:04,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:04,367 INFO L87 Difference]: Start difference. First operand 572 states and 1838 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,249 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 14:38:05,636 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 14:38:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:06,064 INFO L93 Difference]: Finished difference Result 1101 states and 3236 transitions. [2021-06-05 14:38:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:38:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:06,066 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 14:38:06,066 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 14:38:06,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1607.9ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:38:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 14:38:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 575. [2021-06-05 14:38:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.224738675958188) internal successors, (1851), 574 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1851 transitions. [2021-06-05 14:38:06,073 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1851 transitions. Word has length 21 [2021-06-05 14:38:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:06,073 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1851 transitions. [2021-06-05 14:38:06,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1851 transitions. [2021-06-05 14:38:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:06,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:06,074 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:06,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5653,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:06,275 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:06,275 INFO L82 PathProgramCache]: Analyzing trace with hash 586681167, now seen corresponding path program 16 times [2021-06-05 14:38:06,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:06,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759700544] [2021-06-05 14:38:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759700544] [2021-06-05 14:38:06,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759700544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566553375] [2021-06-05 14:38:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:06,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:06,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:06,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:06,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:06,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:06,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:06,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:06,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:06,618 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:38:06,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:06,619 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:38:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566553375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:06,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:06,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479605763] [2021-06-05 14:38:06,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:06,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:06,689 INFO L87 Difference]: Start difference. First operand 575 states and 1851 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:08,535 INFO L93 Difference]: Finished difference Result 1407 states and 4127 transitions. [2021-06-05 14:38:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:38:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:08,537 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 14:38:08,537 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 14:38:08,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1340.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:38:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 14:38:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 569. [2021-06-05 14:38:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.23943661971831) internal successors, (1840), 568 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1840 transitions. [2021-06-05 14:38:08,545 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1840 transitions. Word has length 21 [2021-06-05 14:38:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:08,545 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1840 transitions. [2021-06-05 14:38:08,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1840 transitions. [2021-06-05 14:38:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:08,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:08,546 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:08,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5665,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,746 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2080518403, now seen corresponding path program 17 times [2021-06-05 14:38:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:08,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692221130] [2021-06-05 14:38:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:08,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692221130] [2021-06-05 14:38:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692221130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54524839] [2021-06-05 14:38:08,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:08,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:09,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:09,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:09,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:09,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:09,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:09,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:09,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,094 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:38:09,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:09,095 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:38:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54524839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396258373] [2021-06-05 14:38:09,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:09,162 INFO L87 Difference]: Start difference. First operand 569 states and 1840 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:10,986 INFO L93 Difference]: Finished difference Result 1420 states and 4101 transitions. [2021-06-05 14:38:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:38:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:10,987 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 14:38:10,987 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 14:38:10,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1394.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:38:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 14:38:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 569. [2021-06-05 14:38:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.227112676056338) internal successors, (1833), 568 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1833 transitions. [2021-06-05 14:38:10,996 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1833 transitions. Word has length 21 [2021-06-05 14:38:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:10,996 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1833 transitions. [2021-06-05 14:38:10,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1833 transitions. [2021-06-05 14:38:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:10,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:10,996 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:11,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5674 [2021-06-05 14:38:11,197 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 736646205, now seen corresponding path program 18 times [2021-06-05 14:38:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999084962] [2021-06-05 14:38:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999084962] [2021-06-05 14:38:11,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999084962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948249290] [2021-06-05 14:38:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948249290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:11,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381572647] [2021-06-05 14:38:11,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:11,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:11,533 INFO L87 Difference]: Start difference. First operand 569 states and 1833 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:13,319 INFO L93 Difference]: Finished difference Result 1407 states and 4062 transitions. [2021-06-05 14:38:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:38:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:13,321 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 14:38:13,321 INFO L226 Difference]: Without dead ends: 1151 [2021-06-05 14:38:13,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1290.0ms TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:38:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-06-05 14:38:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 547. [2021-06-05 14:38:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.1941391941391943) internal successors, (1744), 546 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1744 transitions. [2021-06-05 14:38:13,329 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1744 transitions. Word has length 21 [2021-06-05 14:38:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:13,329 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1744 transitions. [2021-06-05 14:38:13,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1744 transitions. [2021-06-05 14:38:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:13,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:13,329 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:13,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,530 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash 648620313, now seen corresponding path program 19 times [2021-06-05 14:38:13,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:13,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083699736] [2021-06-05 14:38:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:13,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083699736] [2021-06-05 14:38:13,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083699736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162811536] [2021-06-05 14:38:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:13,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:13,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:13,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:13,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:13,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:13,830 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:13,863 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 14:38:13,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:13,864 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 14:38:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162811536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:13,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:13,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965609186] [2021-06-05 14:38:13,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:13,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:13,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:13,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:13,941 INFO L87 Difference]: Start difference. First operand 547 states and 1744 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:16,727 INFO L93 Difference]: Finished difference Result 1838 states and 5319 transitions. [2021-06-05 14:38:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:38:16,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:16,729 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 14:38:16,729 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 14:38:16,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2296.7ms TimeCoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:38:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 14:38:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 589. [2021-06-05 14:38:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-06-05 14:38:16,738 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-06-05 14:38:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:16,738 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-06-05 14:38:16,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-06-05 14:38:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:16,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:16,739 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:16,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:16,940 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1068180589, now seen corresponding path program 20 times [2021-06-05 14:38:16,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:16,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995902117] [2021-06-05 14:38:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995902117] [2021-06-05 14:38:17,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995902117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700120140] [2021-06-05 14:38:17,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:17,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:17,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:17,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:17,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:17,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:17,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:17,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:17,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:17,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:17,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:17,285 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:38:17,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:17,286 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:38:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700120140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:17,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703959261] [2021-06-05 14:38:17,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:17,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:17,364 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 14:38:18,394 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 14:38:18,603 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 14:38:18,938 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:38:19,105 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 14:38:19,635 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 14:38:19,782 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 14:38:20,005 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 14:38:21,279 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 14:38:21,457 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 14:38:21,599 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 14:38:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:21,611 INFO L93 Difference]: Finished difference Result 1916 states and 5539 transitions. [2021-06-05 14:38:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:38:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:21,614 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 14:38:21,614 INFO L226 Difference]: Without dead ends: 1653 [2021-06-05 14:38:21,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3729.0ms TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 14:38:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-06-05 14:38:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 583. [2021-06-05 14:38:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.238831615120275) internal successors, (1885), 582 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1885 transitions. [2021-06-05 14:38:21,624 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1885 transitions. Word has length 21 [2021-06-05 14:38:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:21,624 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1885 transitions. [2021-06-05 14:38:21,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1885 transitions. [2021-06-05 14:38:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:21,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:21,624 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:21,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,840 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1985017005, now seen corresponding path program 21 times [2021-06-05 14:38:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:21,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378930880] [2021-06-05 14:38:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:21,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378930880] [2021-06-05 14:38:21,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378930880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087454690] [2021-06-05 14:38:21,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:22,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087454690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:22,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:22,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428614410] [2021-06-05 14:38:22,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:22,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:22,211 INFO L87 Difference]: Start difference. First operand 583 states and 1885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,170 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 14:38:24,558 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 14:38:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:24,673 INFO L93 Difference]: Finished difference Result 1743 states and 5017 transitions. [2021-06-05 14:38:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:38:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:24,679 INFO L225 Difference]: With dead ends: 1743 [2021-06-05 14:38:24,679 INFO L226 Difference]: Without dead ends: 1466 [2021-06-05 14:38:24,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1975.6ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:38:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-06-05 14:38:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 573. [2021-06-05 14:38:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.222027972027972) internal successors, (1843), 572 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1843 transitions. [2021-06-05 14:38:24,688 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1843 transitions. Word has length 21 [2021-06-05 14:38:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:24,688 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1843 transitions. [2021-06-05 14:38:24,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1843 transitions. [2021-06-05 14:38:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:24,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:24,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:24,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5711 [2021-06-05 14:38:24,889 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 596 times [2021-06-05 14:38:24,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:24,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437795904] [2021-06-05 14:38:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:24,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437795904] [2021-06-05 14:38:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437795904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741483350] [2021-06-05 14:38:24,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:25,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:38:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:25,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:25,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:38:25,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:25,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:38:25,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:38:25,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:25,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:25,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:25,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:25,504 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-06-05 14:38:25,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:25,506 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 14:38:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741483350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:25,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:25,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865851461] [2021-06-05 14:38:25,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:25,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:25,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:25,584 INFO L87 Difference]: Start difference. First operand 573 states and 1843 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:26,248 INFO L93 Difference]: Finished difference Result 796 states and 2524 transitions. [2021-06-05 14:38:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:26,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:26,250 INFO L225 Difference]: With dead ends: 796 [2021-06-05 14:38:26,250 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 14:38:26,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 14:38:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 612. [2021-06-05 14:38:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.243862520458265) internal successors, (1982), 611 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1982 transitions. [2021-06-05 14:38:26,256 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1982 transitions. Word has length 21 [2021-06-05 14:38:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:26,256 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1982 transitions. [2021-06-05 14:38:26,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1982 transitions. [2021-06-05 14:38:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:26,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:26,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:26,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5717,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,457 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 597 times [2021-06-05 14:38:26,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:26,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152397044] [2021-06-05 14:38:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:26,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152397044] [2021-06-05 14:38:26,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152397044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42649377] [2021-06-05 14:38:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:38:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:38:27,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:38:27,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:27,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:27,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:38:27,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:27,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:27,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:27,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:27,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:27,134 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-06-05 14:38:27,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:27,136 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-06-05 14:38:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42649377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:27,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:27,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629507814] [2021-06-05 14:38:27,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:27,214 INFO L87 Difference]: Start difference. First operand 612 states and 1982 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:27,926 INFO L93 Difference]: Finished difference Result 836 states and 2636 transitions. [2021-06-05 14:38:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:27,928 INFO L225 Difference]: With dead ends: 836 [2021-06-05 14:38:27,928 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 14:38:27,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 14:38:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 619. [2021-06-05 14:38:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2540453074433655) internal successors, (2011), 618 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2011 transitions. [2021-06-05 14:38:27,935 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2011 transitions. Word has length 21 [2021-06-05 14:38:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:27,935 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2011 transitions. [2021-06-05 14:38:27,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2011 transitions. [2021-06-05 14:38:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:27,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:27,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:28,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5760 [2021-06-05 14:38:28,136 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 598 times [2021-06-05 14:38:28,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:28,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522583857] [2021-06-05 14:38:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:28,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522583857] [2021-06-05 14:38:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522583857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853957199] [2021-06-05 14:38:28,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:28,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:28,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:28,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:38:28,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:38:28,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:28,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:38:28,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:38:28,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:28,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:28,812 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:28,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:28,817 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:28,820 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:28,927 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 14:38:28,927 INFO L628 ElimStorePlain]: treesize reduction 34, result has 80.1 percent of original size [2021-06-05 14:38:28,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:28,931 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 14:38:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853957199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:29,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:38:29,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809728436] [2021-06-05 14:38:29,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:29,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:29,136 INFO L87 Difference]: Start difference. First operand 619 states and 2011 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:30,238 INFO L93 Difference]: Finished difference Result 840 states and 2630 transitions. [2021-06-05 14:38:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:30,239 INFO L225 Difference]: With dead ends: 840 [2021-06-05 14:38:30,240 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 14:38:30,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1127.5ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 14:38:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 605. [2021-06-05 14:38:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.2334437086092715) internal successors, (1953), 604 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1953 transitions. [2021-06-05 14:38:30,246 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1953 transitions. Word has length 21 [2021-06-05 14:38:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:30,246 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1953 transitions. [2021-06-05 14:38:30,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1953 transitions. [2021-06-05 14:38:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:30,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:30,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:30,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,447 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 599 times [2021-06-05 14:38:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992505245] [2021-06-05 14:38:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992505245] [2021-06-05 14:38:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992505245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753098435] [2021-06-05 14:38:30,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:30,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:38:30,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:30,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:30,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:30,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:30,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:30,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:38:30,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:30,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:38:30,947 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:31,010 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-06-05 14:38:31,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:31,012 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-06-05 14:38:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753098435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:31,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:38:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666950043] [2021-06-05 14:38:31,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:31,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:31,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:31,080 INFO L87 Difference]: Start difference. First operand 605 states and 1953 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:31,498 INFO L93 Difference]: Finished difference Result 805 states and 2540 transitions. [2021-06-05 14:38:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:31,499 INFO L225 Difference]: With dead ends: 805 [2021-06-05 14:38:31,499 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 14:38:31,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 14:38:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 626. [2021-06-05 14:38:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.256) internal successors, (2035), 625 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2035 transitions. [2021-06-05 14:38:31,506 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2035 transitions. Word has length 21 [2021-06-05 14:38:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:31,506 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 2035 transitions. [2021-06-05 14:38:31,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2035 transitions. [2021-06-05 14:38:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:31,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:31,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:31,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,707 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 600 times [2021-06-05 14:38:31,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:31,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423254105] [2021-06-05 14:38:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:31,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:31,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423254105] [2021-06-05 14:38:31,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423254105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706187378] [2021-06-05 14:38:31,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:31,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:38:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:32,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:32,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:38:32,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:38:32,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:38:32,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:32,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:38:32,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:38:32,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:38:32,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:38:32,457 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:38:32,462 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:32,467 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:32,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:32,633 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 14:38:32,633 INFO L628 ElimStorePlain]: treesize reduction 75, result has 71.5 percent of original size [2021-06-05 14:38:32,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:32,636 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-06-05 14:38:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:32,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706187378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:32,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:32,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:38:32,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030786193] [2021-06-05 14:38:32,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:32,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:32,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:32,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:32,819 INFO L87 Difference]: Start difference. First operand 626 states and 2035 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,216 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 14:38:33,367 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:38:33,518 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 14:38:33,653 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 14:38:33,790 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 14:38:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:33,845 INFO L93 Difference]: Finished difference Result 872 states and 2702 transitions. [2021-06-05 14:38:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:33,847 INFO L225 Difference]: With dead ends: 872 [2021-06-05 14:38:33,847 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 14:38:33,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1059.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 14:38:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 619. [2021-06-05 14:38:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2459546925566345) internal successors, (2006), 618 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2006 transitions. [2021-06-05 14:38:33,853 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2006 transitions. Word has length 21 [2021-06-05 14:38:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:33,853 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2006 transitions. [2021-06-05 14:38:33,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2006 transitions. [2021-06-05 14:38:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:33,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:33,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:34,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-06-05 14:38:34,055 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 601 times [2021-06-05 14:38:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:34,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982630088] [2021-06-05 14:38:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:34,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982630088] [2021-06-05 14:38:34,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982630088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233071449] [2021-06-05 14:38:34,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:34,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:34,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:34,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:34,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,666 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 14:38:34,667 INFO L628 ElimStorePlain]: treesize reduction 114, result has 61.7 percent of original size [2021-06-05 14:38:34,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:34,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:34,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:34,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:34,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:34,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:34,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:34,774 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 14:38:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233071449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:34,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:38:34,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197261873] [2021-06-05 14:38:34,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:34,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:34,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:34,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:34,922 INFO L87 Difference]: Start difference. First operand 619 states and 2006 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:35,508 INFO L93 Difference]: Finished difference Result 957 states and 2965 transitions. [2021-06-05 14:38:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:35,510 INFO L225 Difference]: With dead ends: 957 [2021-06-05 14:38:35,510 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 14:38:35,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 14:38:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 633. [2021-06-05 14:38:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.2832278481012658) internal successors, (2075), 632 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2075 transitions. [2021-06-05 14:38:35,517 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2075 transitions. Word has length 21 [2021-06-05 14:38:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:35,517 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2075 transitions. [2021-06-05 14:38:35,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2075 transitions. [2021-06-05 14:38:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:35,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:35,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:35,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-06-05 14:38:35,718 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:35,719 INFO L82 PathProgramCache]: Analyzing trace with hash -893071312, now seen corresponding path program 602 times [2021-06-05 14:38:35,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:35,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504632456] [2021-06-05 14:38:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504632456] [2021-06-05 14:38:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504632456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863963301] [2021-06-05 14:38:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:36,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:36,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:38:36,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:36,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:36,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:36,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:36,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:38:36,415 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:36,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:38:36,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:36,426 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:36,430 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:36,434 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,532 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-06-05 14:38:36,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:36,534 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 14:38:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863963301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:36,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:36,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:38:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143360838] [2021-06-05 14:38:36,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:36,688 INFO L87 Difference]: Start difference. First operand 633 states and 2075 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:37,564 INFO L93 Difference]: Finished difference Result 925 states and 2856 transitions. [2021-06-05 14:38:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:37,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:37,565 INFO L225 Difference]: With dead ends: 925 [2021-06-05 14:38:37,565 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 14:38:37,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 799.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 14:38:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 587. [2021-06-05 14:38:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.2218430034129693) internal successors, (1888), 586 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1888 transitions. [2021-06-05 14:38:37,572 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1888 transitions. Word has length 21 [2021-06-05 14:38:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:37,572 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1888 transitions. [2021-06-05 14:38:37,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1888 transitions. [2021-06-05 14:38:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:37,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:37,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:37,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-06-05 14:38:37,773 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 603 times [2021-06-05 14:38:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505259985] [2021-06-05 14:38:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:37,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:37,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505259985] [2021-06-05 14:38:37,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505259985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:37,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40658877] [2021-06-05 14:38:37,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:38,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:38,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:38:38,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:38,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:38,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:38:38,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:38,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:38:38,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:38,322 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:38,387 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-06-05 14:38:38,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:38,388 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-06-05 14:38:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:38,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40658877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:38,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:38,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:38:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756177601] [2021-06-05 14:38:38,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:38,459 INFO L87 Difference]: Start difference. First operand 587 states and 1888 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:38,875 INFO L93 Difference]: Finished difference Result 758 states and 2401 transitions. [2021-06-05 14:38:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:38,876 INFO L225 Difference]: With dead ends: 758 [2021-06-05 14:38:38,876 INFO L226 Difference]: Without dead ends: 711 [2021-06-05 14:38:38,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-05 14:38:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 612. [2021-06-05 14:38:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.237315875613748) internal successors, (1978), 611 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1978 transitions. [2021-06-05 14:38:38,882 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1978 transitions. Word has length 21 [2021-06-05 14:38:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:38,882 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1978 transitions. [2021-06-05 14:38:38,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1978 transitions. [2021-06-05 14:38:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:38,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:38,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:39,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6183,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:39,084 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 604 times [2021-06-05 14:38:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:39,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253686221] [2021-06-05 14:38:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253686221] [2021-06-05 14:38:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253686221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315773620] [2021-06-05 14:38:39,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:39,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:39,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:39,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:38:39,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:38:39,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:38:39,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:39,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:39,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:38:39,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:39,768 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:38:39,773 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:39,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:39,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:39,788 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:38:39,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,911 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 14:38:39,911 INFO L628 ElimStorePlain]: treesize reduction 155, result has 46.9 percent of original size [2021-06-05 14:38:39,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:39,913 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-06-05 14:38:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:40,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315773620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:40,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:40,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:38:40,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497194517] [2021-06-05 14:38:40,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:40,116 INFO L87 Difference]: Start difference. First operand 612 states and 1978 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:41,183 INFO L93 Difference]: Finished difference Result 809 states and 2536 transitions. [2021-06-05 14:38:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:41,184 INFO L225 Difference]: With dead ends: 809 [2021-06-05 14:38:41,184 INFO L226 Difference]: Without dead ends: 740 [2021-06-05 14:38:41,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1068.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-05 14:38:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 605. [2021-06-05 14:38:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.2268211920529803) internal successors, (1949), 604 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1949 transitions. [2021-06-05 14:38:41,190 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1949 transitions. Word has length 21 [2021-06-05 14:38:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:41,190 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1949 transitions. [2021-06-05 14:38:41,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1949 transitions. [2021-06-05 14:38:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:41,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:41,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6226,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:41,392 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 605 times [2021-06-05 14:38:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716390944] [2021-06-05 14:38:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:41,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716390944] [2021-06-05 14:38:41,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716390944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933253207] [2021-06-05 14:38:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:41,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:41,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:41,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:41,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:41,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:41,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:42,037 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 14:38:42,038 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 14:38:42,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:42,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:42,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:42,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:42,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:42,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:42,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:42,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:42,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:42,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:42,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:42,145 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 14:38:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933253207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:42,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:42,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:38:42,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539149495] [2021-06-05 14:38:42,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:42,290 INFO L87 Difference]: Start difference. First operand 605 states and 1949 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:42,823 INFO L93 Difference]: Finished difference Result 890 states and 2751 transitions. [2021-06-05 14:38:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:42,825 INFO L225 Difference]: With dead ends: 890 [2021-06-05 14:38:42,825 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 14:38:42,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 14:38:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 614. [2021-06-05 14:38:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.2495921696574226) internal successors, (1992), 613 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1992 transitions. [2021-06-05 14:38:42,832 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1992 transitions. Word has length 21 [2021-06-05 14:38:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:42,832 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1992 transitions. [2021-06-05 14:38:42,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1992 transitions. [2021-06-05 14:38:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:42,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:42,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:43,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6298 [2021-06-05 14:38:43,033 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 606 times [2021-06-05 14:38:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:43,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533912480] [2021-06-05 14:38:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:43,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533912480] [2021-06-05 14:38:43,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533912480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:43,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378601541] [2021-06-05 14:38:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:43,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:43,582 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_180, v_prenex_178], 1=[v_prenex_179, nondet_0]} [2021-06-05 14:38:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:43,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,703 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 14:38:43,704 INFO L628 ElimStorePlain]: treesize reduction 279, result has 33.1 percent of original size [2021-06-05 14:38:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:43,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,798 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 14:38:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:43,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:43,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:43,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,915 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:38:43,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:43,917 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 14:38:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378601541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:44,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:44,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:38:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354354593] [2021-06-05 14:38:44,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:44,063 INFO L87 Difference]: Start difference. First operand 614 states and 1992 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:44,834 INFO L93 Difference]: Finished difference Result 858 states and 2642 transitions. [2021-06-05 14:38:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:44,836 INFO L225 Difference]: With dead ends: 858 [2021-06-05 14:38:44,836 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 14:38:44,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 767.0ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 14:38:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 602. [2021-06-05 14:38:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.234608985024958) internal successors, (1944), 601 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1944 transitions. [2021-06-05 14:38:44,842 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1944 transitions. Word has length 21 [2021-06-05 14:38:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:44,842 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1944 transitions. [2021-06-05 14:38:44,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1944 transitions. [2021-06-05 14:38:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:44,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:44,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:45,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,044 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 607 times [2021-06-05 14:38:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:45,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98990069] [2021-06-05 14:38:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:45,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98990069] [2021-06-05 14:38:45,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98990069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033725998] [2021-06-05 14:38:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:45,423 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 14:38:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:45,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:38:45,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:45,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,855 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 14:38:45,856 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 14:38:45,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:45,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:45,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:45,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:45,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:45,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:45,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:46,025 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.7 percent of original size [2021-06-05 14:38:46,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:46,027 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 14:38:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033725998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:46,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671841221] [2021-06-05 14:38:46,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:46,190 INFO L87 Difference]: Start difference. First operand 602 states and 1944 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,404 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:38:46,949 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-05 14:38:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:47,112 INFO L93 Difference]: Finished difference Result 941 states and 2880 transitions. [2021-06-05 14:38:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:47,113 INFO L225 Difference]: With dead ends: 941 [2021-06-05 14:38:47,113 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 14:38:47,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 988.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 14:38:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 620. [2021-06-05 14:38:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.268174474959612) internal successors, (2023), 619 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2023 transitions. [2021-06-05 14:38:47,120 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2023 transitions. Word has length 21 [2021-06-05 14:38:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:47,120 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2023 transitions. [2021-06-05 14:38:47,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2023 transitions. [2021-06-05 14:38:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:47,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:47,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:47,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6392 [2021-06-05 14:38:47,321 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash -917949072, now seen corresponding path program 608 times [2021-06-05 14:38:47,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:47,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239111917] [2021-06-05 14:38:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239111917] [2021-06-05 14:38:47,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239111917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140662499] [2021-06-05 14:38:47,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:47,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:47,911 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, v_prenex_189], 1=[v_prenex_188, nondet_0]} [2021-06-05 14:38:47,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:47,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:47,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:47,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:47,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,042 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 14:38:48,042 INFO L628 ElimStorePlain]: treesize reduction 221, result has 39.8 percent of original size [2021-06-05 14:38:48,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:48,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,130 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 14:38:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:48,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:48,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:48,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:48,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:48,250 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:38:48,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:48,253 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 14:38:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140662499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:38:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416136329] [2021-06-05 14:38:48,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:48,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:48,415 INFO L87 Difference]: Start difference. First operand 620 states and 2023 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,653 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:38:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:49,410 INFO L93 Difference]: Finished difference Result 1014 states and 3030 transitions. [2021-06-05 14:38:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:49,412 INFO L225 Difference]: With dead ends: 1014 [2021-06-05 14:38:49,412 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 14:38:49,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 14:38:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 623. [2021-06-05 14:38:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.2443729903536975) internal successors, (2018), 622 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2018 transitions. [2021-06-05 14:38:49,419 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2018 transitions. Word has length 21 [2021-06-05 14:38:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:49,419 INFO L482 AbstractCegarLoop]: Abstraction has 623 states and 2018 transitions. [2021-06-05 14:38:49,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2018 transitions. [2021-06-05 14:38:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:49,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:49,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:49,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6459,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,620 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1051616592, now seen corresponding path program 609 times [2021-06-05 14:38:49,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:49,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982668373] [2021-06-05 14:38:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:49,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982668373] [2021-06-05 14:38:49,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982668373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215221264] [2021-06-05 14:38:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:49,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:38:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:50,112 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_193, v_prenex_194], 1=[nondet_0]} [2021-06-05 14:38:50,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:38:50,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:38:50,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,156 INFO L628 ElimStorePlain]: treesize reduction 107, result has 28.7 percent of original size [2021-06-05 14:38:50,156 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-06-05 14:38:50,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:50,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:50,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:50,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:50,171 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:30 [2021-06-05 14:38:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215221264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:50,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333892564] [2021-06-05 14:38:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:50,227 INFO L87 Difference]: Start difference. First operand 623 states and 2018 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,451 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:38:50,632 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:38:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:50,867 INFO L93 Difference]: Finished difference Result 782 states and 2402 transitions. [2021-06-05 14:38:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:50,868 INFO L225 Difference]: With dead ends: 782 [2021-06-05 14:38:50,868 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 14:38:50,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 14:38:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 629. [2021-06-05 14:38:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2245222929936306) internal successors, (2025), 628 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2025 transitions. [2021-06-05 14:38:50,875 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2025 transitions. Word has length 21 [2021-06-05 14:38:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:50,875 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2025 transitions. [2021-06-05 14:38:50,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2025 transitions. [2021-06-05 14:38:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:50,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:50,875 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:51,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6521 [2021-06-05 14:38:51,076 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash 671100815, now seen corresponding path program 22 times [2021-06-05 14:38:51,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:51,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541942473] [2021-06-05 14:38:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:51,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541942473] [2021-06-05 14:38:51,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541942473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385376704] [2021-06-05 14:38:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:51,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:51,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385376704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:51,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:38:51,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481289715] [2021-06-05 14:38:51,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:51,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:51,389 INFO L87 Difference]: Start difference. First operand 629 states and 2025 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:52,841 INFO L93 Difference]: Finished difference Result 1261 states and 3687 transitions. [2021-06-05 14:38:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:38:52,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:52,842 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 14:38:52,842 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 14:38:52,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1131.4ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:38:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 14:38:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 632. [2021-06-05 14:38:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.202852614896989) internal successors, (2021), 631 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2021 transitions. [2021-06-05 14:38:52,850 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2021 transitions. Word has length 21 [2021-06-05 14:38:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:52,850 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2021 transitions. [2021-06-05 14:38:52,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2021 transitions. [2021-06-05 14:38:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:52,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:52,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:53,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6556,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,051 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 610 times [2021-06-05 14:38:53,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:53,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187715703] [2021-06-05 14:38:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187715703] [2021-06-05 14:38:53,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187715703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923414185] [2021-06-05 14:38:53,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:53,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:53,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:53,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:53,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:53,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:53,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:53,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:53,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 14:38:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923414185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:38:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943320064] [2021-06-05 14:38:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:53,512 INFO L87 Difference]: Start difference. First operand 632 states and 2021 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:54,330 INFO L93 Difference]: Finished difference Result 968 states and 2993 transitions. [2021-06-05 14:38:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:54,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:54,332 INFO L225 Difference]: With dead ends: 968 [2021-06-05 14:38:54,332 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 14:38:54,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 14:38:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 651. [2021-06-05 14:38:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.2246153846153844) internal successors, (2096), 650 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2096 transitions. [2021-06-05 14:38:54,339 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2096 transitions. Word has length 21 [2021-06-05 14:38:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:54,339 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 2096 transitions. [2021-06-05 14:38:54,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2096 transitions. [2021-06-05 14:38:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:54,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:54,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6560,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,540 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 611 times [2021-06-05 14:38:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:54,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840495977] [2021-06-05 14:38:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:54,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840495977] [2021-06-05 14:38:54,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840495977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597485640] [2021-06-05 14:38:54,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:55,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:55,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:55,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,159 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-06-05 14:38:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:55,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:55,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:55,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:55,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 14:38:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597485640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:55,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:38:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146028716] [2021-06-05 14:38:55,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:55,307 INFO L87 Difference]: Start difference. First operand 651 states and 2096 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:56,197 INFO L93 Difference]: Finished difference Result 908 states and 2840 transitions. [2021-06-05 14:38:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:56,198 INFO L225 Difference]: With dead ends: 908 [2021-06-05 14:38:56,198 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 14:38:56,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 875.0ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 14:38:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 658. [2021-06-05 14:38:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.234398782343988) internal successors, (2125), 657 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2125 transitions. [2021-06-05 14:38:56,205 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2125 transitions. Word has length 21 [2021-06-05 14:38:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:56,206 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2125 transitions. [2021-06-05 14:38:56,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2125 transitions. [2021-06-05 14:38:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:56,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:56,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:56,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6576 [2021-06-05 14:38:56,407 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 612 times [2021-06-05 14:38:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:56,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587157263] [2021-06-05 14:38:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:56,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587157263] [2021-06-05 14:38:56,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587157263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270296168] [2021-06-05 14:38:56,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:38:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:38:56,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:56,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:56,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:56,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:38:56,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:56,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:56,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:56,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:56,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:56,739 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:56,742 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:56,831 INFO L628 ElimStorePlain]: treesize reduction 64, result has 62.6 percent of original size [2021-06-05 14:38:56,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:38:56,833 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:401, output treesize:107 [2021-06-05 14:38:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270296168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:56,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:56,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727242556] [2021-06-05 14:38:56,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:56,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:56,977 INFO L87 Difference]: Start difference. First operand 658 states and 2125 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,359 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 14:38:57,503 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:38:57,645 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 14:38:57,935 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 14:38:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:57,995 INFO L93 Difference]: Finished difference Result 1121 states and 3412 transitions. [2021-06-05 14:38:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:57,997 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 14:38:57,997 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 14:38:57,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 14:38:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 672. [2021-06-05 14:38:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.263785394932936) internal successors, (2190), 671 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2190 transitions. [2021-06-05 14:38:58,005 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2190 transitions. Word has length 21 [2021-06-05 14:38:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:58,005 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2190 transitions. [2021-06-05 14:38:58,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2190 transitions. [2021-06-05 14:38:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:58,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:58,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6623,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,206 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 613 times [2021-06-05 14:38:58,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:58,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476219134] [2021-06-05 14:38:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:58,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476219134] [2021-06-05 14:38:58,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476219134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108016443] [2021-06-05 14:38:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:38:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:38:58,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:38:58,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:38:58,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:38:58,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:58,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:58,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:58,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 14:38:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108016443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:58,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 14:38:58,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47916481] [2021-06-05 14:38:58,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:38:58,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:38:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:58,746 INFO L87 Difference]: Start difference. First operand 672 states and 2190 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:59,539 INFO L93 Difference]: Finished difference Result 991 states and 3102 transitions. [2021-06-05 14:38:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:59,541 INFO L225 Difference]: With dead ends: 991 [2021-06-05 14:38:59,541 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 14:38:59,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 781.5ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:38:59,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 14:38:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 692. [2021-06-05 14:38:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 14:38:59,549 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 14:38:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 14:38:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 14:38:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:59,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:59,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:59,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6642 [2021-06-05 14:38:59,750 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 614 times [2021-06-05 14:38:59,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:59,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301488764] [2021-06-05 14:38:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301488764] [2021-06-05 14:38:59,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301488764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543526829] [2021-06-05 14:38:59,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:38:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:00,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:00,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:00,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:00,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:00,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:00,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:00,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:00,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:00,375 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:00,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:00,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:00,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:00,546 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 14:39:00,546 INFO L628 ElimStorePlain]: treesize reduction 83, result has 69.4 percent of original size [2021-06-05 14:39:00,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:00,548 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:108 [2021-06-05 14:39:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543526829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:00,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:39:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400658267] [2021-06-05 14:39:00,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:00,732 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,106 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 14:39:01,251 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:39:01,399 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 14:39:01,535 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 14:39:01,665 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 14:39:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:01,713 INFO L93 Difference]: Finished difference Result 940 states and 2947 transitions. [2021-06-05 14:39:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:01,714 INFO L225 Difference]: With dead ends: 940 [2021-06-05 14:39:01,714 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 14:39:01,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1036.9ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 14:39:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 692. [2021-06-05 14:39:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 14:39:01,722 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 14:39:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:01,722 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 14:39:01,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 14:39:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:01,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:01,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:01,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:01,923 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 615 times [2021-06-05 14:39:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:01,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842222969] [2021-06-05 14:39:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:02,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842222969] [2021-06-05 14:39:02,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842222969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153968877] [2021-06-05 14:39:02,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:02,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:39:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:02,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:02,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:02,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:02,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:02,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:02,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:39:02,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:02,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:02,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:02,636 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:02,652 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:02,657 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:02,661 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:02,773 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 14:39:02,773 INFO L628 ElimStorePlain]: treesize reduction 43, result has 77.4 percent of original size [2021-06-05 14:39:02,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:02,775 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 14:39:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153968877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:02,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:39:02,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920761120] [2021-06-05 14:39:02,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:02,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:02,925 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:03,769 INFO L93 Difference]: Finished difference Result 1079 states and 3345 transitions. [2021-06-05 14:39:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:03,771 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 14:39:03,771 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 14:39:03,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 14:39:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2021-06-05 14:39:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.3163120567375888) internal successors, (2338), 705 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2338 transitions. [2021-06-05 14:39:03,779 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2338 transitions. Word has length 21 [2021-06-05 14:39:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:03,779 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2338 transitions. [2021-06-05 14:39:03,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2338 transitions. [2021-06-05 14:39:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:03,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:03,780 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6729 [2021-06-05 14:39:03,981 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 616 times [2021-06-05 14:39:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755099827] [2021-06-05 14:39:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755099827] [2021-06-05 14:39:04,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755099827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561975088] [2021-06-05 14:39:04,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:04,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:04,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:04,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:04,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:04,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:04,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:04,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:04,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:04,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:04,612 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-06-05 14:39:04,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:04,614 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 14:39:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561975088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:04,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:04,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630643723] [2021-06-05 14:39:04,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:04,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:04,765 INFO L87 Difference]: Start difference. First operand 706 states and 2338 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,122 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 14:39:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:05,707 INFO L93 Difference]: Finished difference Result 970 states and 3035 transitions. [2021-06-05 14:39:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:05,709 INFO L225 Difference]: With dead ends: 970 [2021-06-05 14:39:05,709 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 14:39:05,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 14:39:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 692. [2021-06-05 14:39:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.2836468885672936) internal successors, (2269), 691 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 14:39:05,717 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 14:39:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:05,717 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 14:39:05,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 14:39:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:05,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:05,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:05,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6847 [2021-06-05 14:39:05,918 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 617 times [2021-06-05 14:39:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:05,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198881295] [2021-06-05 14:39:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:06,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198881295] [2021-06-05 14:39:06,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198881295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209275095] [2021-06-05 14:39:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:06,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:39:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:06,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:06,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:06,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:39:06,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:06,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:39:06,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:06,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:06,512 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-06-05 14:39:06,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:06,514 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-06-05 14:39:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209275095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:39:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126286000] [2021-06-05 14:39:06,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:06,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:06,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:06,590 INFO L87 Difference]: Start difference. First operand 692 states and 2269 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:07,146 INFO L93 Difference]: Finished difference Result 872 states and 2822 transitions. [2021-06-05 14:39:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:07,147 INFO L225 Difference]: With dead ends: 872 [2021-06-05 14:39:07,147 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 14:39:07,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 14:39:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 710. [2021-06-05 14:39:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.286318758815233) internal successors, (2330), 709 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 14:39:07,155 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 14:39:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:07,155 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 14:39:07,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 14:39:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:07,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:07,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:07,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6897,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,356 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 618 times [2021-06-05 14:39:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:07,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259487157] [2021-06-05 14:39:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:07,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259487157] [2021-06-05 14:39:07,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259487157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535140255] [2021-06-05 14:39:07,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:39:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:07,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:07,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:07,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:07,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:07,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:07,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:07,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:07,992 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:07,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:08,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:08,000 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:08,152 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 14:39:08,152 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 14:39:08,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:08,154 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 14:39:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535140255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:08,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:39:08,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615707494] [2021-06-05 14:39:08,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:08,337 INFO L87 Difference]: Start difference. First operand 710 states and 2330 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,692 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 14:39:08,834 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:39:08,984 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 14:39:09,155 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 14:39:09,284 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 14:39:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:09,353 INFO L93 Difference]: Finished difference Result 1096 states and 3417 transitions. [2021-06-05 14:39:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:09,354 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 14:39:09,354 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 14:39:09,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1022.7ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 14:39:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 710. [2021-06-05 14:39:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.286318758815233) internal successors, (2330), 709 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 14:39:09,362 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 14:39:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:09,362 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 14:39:09,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 14:39:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:09,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:09,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:09,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6932,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,563 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 619 times [2021-06-05 14:39:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:09,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010399313] [2021-06-05 14:39:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:09,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010399313] [2021-06-05 14:39:09,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010399313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592804854] [2021-06-05 14:39:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:09,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:10,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:10,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:10,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,235 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 14:39:10,235 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 14:39:10,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:10,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:10,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:10,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:39:10,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:10,314 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:10,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:10,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:10,358 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 14:39:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592804854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063609037] [2021-06-05 14:39:10,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:10,598 INFO L87 Difference]: Start difference. First operand 710 states and 2330 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:11,339 INFO L93 Difference]: Finished difference Result 1025 states and 3210 transitions. [2021-06-05 14:39:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:11,341 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 14:39:11,341 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 14:39:11,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 14:39:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 719. [2021-06-05 14:39:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.3050139275766015) internal successors, (2373), 718 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2373 transitions. [2021-06-05 14:39:11,349 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2373 transitions. Word has length 21 [2021-06-05 14:39:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:11,349 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2373 transitions. [2021-06-05 14:39:11,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2373 transitions. [2021-06-05 14:39:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:11,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:11,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:11,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7006,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,551 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 620 times [2021-06-05 14:39:11,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:11,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394401845] [2021-06-05 14:39:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394401845] [2021-06-05 14:39:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394401845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045870029] [2021-06-05 14:39:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:12,090 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_212, v_prenex_213], 1=[nondet_0, v_prenex_214]} [2021-06-05 14:39:12,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:12,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:12,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:12,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,225 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:39:12,225 INFO L628 ElimStorePlain]: treesize reduction 217, result has 40.9 percent of original size [2021-06-05 14:39:12,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:12,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,315 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.6 percent of original size [2021-06-05 14:39:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:39:12,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:12,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:12,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,391 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 14:39:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:12,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:12,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:12,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:12,429 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 14:39:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045870029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:12,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:12,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:12,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441585039] [2021-06-05 14:39:12,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:12,586 INFO L87 Difference]: Start difference. First operand 719 states and 2373 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:13,371 INFO L93 Difference]: Finished difference Result 1026 states and 3191 transitions. [2021-06-05 14:39:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:13,373 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 14:39:13,373 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 14:39:13,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 14:39:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2021-06-05 14:39:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.2868852459016393) internal successors, (2406), 732 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 14:39:13,381 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 14:39:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:13,381 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 14:39:13,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 14:39:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:13,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:13,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:13,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7068 [2021-06-05 14:39:13,582 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 621 times [2021-06-05 14:39:13,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:13,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256207497] [2021-06-05 14:39:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256207497] [2021-06-05 14:39:13,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256207497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353710409] [2021-06-05 14:39:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:13,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:14,004 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:39:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:14,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:14,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:14,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:14,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:14,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:14,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:39:14,305 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:14,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:14,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:14,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:14,437 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 14:39:14,437 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-06-05 14:39:14,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:14,439 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-06-05 14:39:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353710409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:14,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:39:14,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98943983] [2021-06-05 14:39:14,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:14,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:14,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:14,690 INFO L87 Difference]: Start difference. First operand 733 states and 2406 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,940 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:39:15,473 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 14:39:15,878 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 14:39:16,022 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 14:39:16,177 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:39:16,306 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 14:39:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:16,609 INFO L93 Difference]: Finished difference Result 1124 states and 3466 transitions. [2021-06-05 14:39:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:39:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:16,611 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 14:39:16,611 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 14:39:16,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2040.8ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:39:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 14:39:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 751. [2021-06-05 14:39:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3133333333333335) internal successors, (2485), 750 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2485 transitions. [2021-06-05 14:39:16,619 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2485 transitions. Word has length 21 [2021-06-05 14:39:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:16,619 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2485 transitions. [2021-06-05 14:39:16,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2485 transitions. [2021-06-05 14:39:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:16,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:16,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:16,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7119,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,820 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 622 times [2021-06-05 14:39:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:16,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976088769] [2021-06-05 14:39:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:16,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:16,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976088769] [2021-06-05 14:39:16,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976088769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:16,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416497686] [2021-06-05 14:39:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:17,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:17,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:17,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:17,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:17,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:17,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:17,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:17,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:17,516 INFO L628 ElimStorePlain]: treesize reduction 44, result has 69.2 percent of original size [2021-06-05 14:39:17,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:17,517 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 14:39:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416497686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:17,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:39:17,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354003627] [2021-06-05 14:39:17,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:17,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:17,680 INFO L87 Difference]: Start difference. First operand 751 states and 2485 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,937 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:39:18,241 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 14:39:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:18,933 INFO L93 Difference]: Finished difference Result 1032 states and 3203 transitions. [2021-06-05 14:39:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:18,934 INFO L225 Difference]: With dead ends: 1032 [2021-06-05 14:39:18,934 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 14:39:18,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1236.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 14:39:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 742. [2021-06-05 14:39:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.2955465587044532) internal successors, (2442), 741 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2442 transitions. [2021-06-05 14:39:18,942 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2442 transitions. Word has length 21 [2021-06-05 14:39:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2442 transitions. [2021-06-05 14:39:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2442 transitions. [2021-06-05 14:39:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:18,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:18,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7195,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:19,144 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 623 times [2021-06-05 14:39:19,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:19,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939781152] [2021-06-05 14:39:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:19,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939781152] [2021-06-05 14:39:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939781152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584416574] [2021-06-05 14:39:19,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:19,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:19,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:19,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:19,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:19,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:19,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:19,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:19,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:19,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:19,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:19,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:19,833 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:19,981 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:39:19,981 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-06-05 14:39:19,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:19,984 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-06-05 14:39:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584416574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:39:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864699027] [2021-06-05 14:39:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:20,143 INFO L87 Difference]: Start difference. First operand 742 states and 2442 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,375 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:39:20,557 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:39:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:21,252 INFO L93 Difference]: Finished difference Result 995 states and 3138 transitions. [2021-06-05 14:39:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:21,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:21,254 INFO L225 Difference]: With dead ends: 995 [2021-06-05 14:39:21,254 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 14:39:21,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1111.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 14:39:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 733. [2021-06-05 14:39:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.2868852459016393) internal successors, (2406), 732 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 14:39:21,261 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 14:39:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:21,262 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 14:39:21,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 14:39:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:21,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:21,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:21,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7249,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,463 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 624 times [2021-06-05 14:39:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:21,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007714171] [2021-06-05 14:39:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:21,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007714171] [2021-06-05 14:39:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007714171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821915647] [2021-06-05 14:39:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:22,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:22,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:22,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:22,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:22,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:22,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:22,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:22,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:22,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:22,130 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:22,203 INFO L628 ElimStorePlain]: treesize reduction 73, result has 55.2 percent of original size [2021-06-05 14:39:22,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:22,205 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-06-05 14:39:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821915647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:22,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534353441] [2021-06-05 14:39:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:22,318 INFO L87 Difference]: Start difference. First operand 733 states and 2406 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:23,105 INFO L93 Difference]: Finished difference Result 952 states and 3054 transitions. [2021-06-05 14:39:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:23,106 INFO L225 Difference]: With dead ends: 952 [2021-06-05 14:39:23,106 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 14:39:23,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 14:39:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 739. [2021-06-05 14:39:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2886178861788617) internal successors, (2427), 738 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 14:39:23,114 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 14:39:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:23,114 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 14:39:23,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 14:39:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:23,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:23,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:23,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7286,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,315 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 625 times [2021-06-05 14:39:23,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:23,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867549762] [2021-06-05 14:39:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867549762] [2021-06-05 14:39:23,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867549762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687867986] [2021-06-05 14:39:23,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:23,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:23,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:23,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:23,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:23,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:23,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:23,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:23,887 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:23,890 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:23,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:23,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:23,942 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 14:39:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687867986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:24,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727465121] [2021-06-05 14:39:24,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:24,142 INFO L87 Difference]: Start difference. First operand 739 states and 2427 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,025 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 14:39:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:25,209 INFO L93 Difference]: Finished difference Result 965 states and 3081 transitions. [2021-06-05 14:39:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:25,214 INFO L225 Difference]: With dead ends: 965 [2021-06-05 14:39:25,215 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 14:39:25,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1075.5ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 14:39:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 14:39:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2886178861788617) internal successors, (2427), 738 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 14:39:25,223 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 14:39:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:25,223 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 14:39:25,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 14:39:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:25,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:25,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:25,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7370 [2021-06-05 14:39:25,424 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 626 times [2021-06-05 14:39:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:25,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571813849] [2021-06-05 14:39:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:25,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571813849] [2021-06-05 14:39:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571813849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075411461] [2021-06-05 14:39:25,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:25,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:39:26,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:26,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:39:26,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:26,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:26,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:26,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:26,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:26,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:26,124 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:26,128 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:26,245 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:39:26,246 INFO L628 ElimStorePlain]: treesize reduction 72, result has 67.0 percent of original size [2021-06-05 14:39:26,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:26,247 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:82 [2021-06-05 14:39:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075411461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:26,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:26,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078330829] [2021-06-05 14:39:26,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:26,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:26,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:26,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:26,488 INFO L87 Difference]: Start difference. First operand 739 states and 2427 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,959 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-06-05 14:39:27,082 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 14:39:27,247 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 14:39:27,403 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 14:39:27,692 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:39:27,878 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 14:39:28,122 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 14:39:28,267 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 14:39:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:28,291 INFO L93 Difference]: Finished difference Result 1143 states and 3515 transitions. [2021-06-05 14:39:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:28,293 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:39:28,293 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 14:39:28,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1810.3ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 14:39:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 748. [2021-06-05 14:39:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3065595716198124) internal successors, (2470), 747 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2470 transitions. [2021-06-05 14:39:28,302 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2470 transitions. Word has length 21 [2021-06-05 14:39:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2470 transitions. [2021-06-05 14:39:28,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2470 transitions. [2021-06-05 14:39:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:28,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:28,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:28,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7410 [2021-06-05 14:39:28,503 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:28,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 627 times [2021-06-05 14:39:28,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:28,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872718287] [2021-06-05 14:39:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872718287] [2021-06-05 14:39:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872718287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812924492] [2021-06-05 14:39:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:28,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:28,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:29,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:29,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:29,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:29,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:29,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:29,135 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:29,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:29,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:29,148 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:29,153 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:29,157 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:29,161 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:29,260 INFO L628 ElimStorePlain]: treesize reduction 59, result has 69.1 percent of original size [2021-06-05 14:39:29,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:29,262 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 14:39:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812924492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:29,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:39:29,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467478601] [2021-06-05 14:39:29,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:29,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:29,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:29,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:29,412 INFO L87 Difference]: Start difference. First operand 748 states and 2470 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:30,236 INFO L93 Difference]: Finished difference Result 1014 states and 3187 transitions. [2021-06-05 14:39:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:30,238 INFO L225 Difference]: With dead ends: 1014 [2021-06-05 14:39:30,238 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 14:39:30,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 14:39:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 730. [2021-06-05 14:39:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2825788751714677) internal successors, (2393), 729 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2393 transitions. [2021-06-05 14:39:30,246 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2393 transitions. Word has length 21 [2021-06-05 14:39:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:30,246 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2393 transitions. [2021-06-05 14:39:30,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2393 transitions. [2021-06-05 14:39:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:30,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:30,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:30,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7531 [2021-06-05 14:39:30,447 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 628 times [2021-06-05 14:39:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713950064] [2021-06-05 14:39:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:30,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713950064] [2021-06-05 14:39:30,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713950064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595627275] [2021-06-05 14:39:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:30,862 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 14:39:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:31,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:31,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:39:31,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:31,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:31,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 14:39:31,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-06-05 14:39:31,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:39:31,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-06-05 14:39:31,293 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:31,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:31,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:31,302 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:31,305 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:31,421 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:39:31,422 INFO L628 ElimStorePlain]: treesize reduction 79, result has 65.0 percent of original size [2021-06-05 14:39:31,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:31,423 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 14:39:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595627275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:31,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:39:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594208328] [2021-06-05 14:39:31,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:31,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:31,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:31,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:31,662 INFO L87 Difference]: Start difference. First operand 730 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,905 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 14:39:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:33,288 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-06-05 14:39:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:39:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:33,290 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 14:39:33,290 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 14:39:33,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1723.6ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:39:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 14:39:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 748. [2021-06-05 14:39:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3092369477911645) internal successors, (2472), 747 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2472 transitions. [2021-06-05 14:39:33,299 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2472 transitions. Word has length 21 [2021-06-05 14:39:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:33,299 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2472 transitions. [2021-06-05 14:39:33,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2472 transitions. [2021-06-05 14:39:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:33,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:33,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:33,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7588,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:33,500 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 629 times [2021-06-05 14:39:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:33,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200025140] [2021-06-05 14:39:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:33,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:33,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200025140] [2021-06-05 14:39:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200025140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:33,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334469183] [2021-06-05 14:39:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:33,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:34,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:34,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:34,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:34,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:39:34,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:34,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:39:34,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:34,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:34,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:34,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:34,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:34,201 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:39:34,205 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:34,304 INFO L628 ElimStorePlain]: treesize reduction 57, result has 69.8 percent of original size [2021-06-05 14:39:34,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:34,306 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 14:39:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334469183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:34,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:39:34,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330223491] [2021-06-05 14:39:34,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:34,476 INFO L87 Difference]: Start difference. First operand 748 states and 2472 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,716 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 14:39:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:35,553 INFO L93 Difference]: Finished difference Result 1164 states and 3546 transitions. [2021-06-05 14:39:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:35,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:35,554 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 14:39:35,554 INFO L226 Difference]: Without dead ends: 1080 [2021-06-05 14:39:35,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-05 14:39:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 751. [2021-06-05 14:39:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.2893333333333334) internal successors, (2467), 750 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2467 transitions. [2021-06-05 14:39:35,563 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2467 transitions. Word has length 21 [2021-06-05 14:39:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:35,563 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2467 transitions. [2021-06-05 14:39:35,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2467 transitions. [2021-06-05 14:39:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:35,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:35,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:35,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-05 14:39:35,765 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 630 times [2021-06-05 14:39:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:35,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988672972] [2021-06-05 14:39:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:35,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988672972] [2021-06-05 14:39:35,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988672972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676040513] [2021-06-05 14:39:35,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:36,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:36,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:36,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:36,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:36,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:36,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:36,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:36,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:36,213 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 14:39:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676040513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:36,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:39:36,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228466010] [2021-06-05 14:39:36,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:39:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:36,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:39:36,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:36,398 INFO L87 Difference]: Start difference. First operand 751 states and 2467 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:37,531 INFO L93 Difference]: Finished difference Result 1118 states and 3569 transitions. [2021-06-05 14:39:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:37,532 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 14:39:37,532 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 14:39:37,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 989.0ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:39:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 14:39:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 721. [2021-06-05 14:39:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.286111111111111) internal successors, (2366), 720 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2366 transitions. [2021-06-05 14:39:37,541 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2366 transitions. Word has length 21 [2021-06-05 14:39:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:37,541 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2366 transitions. [2021-06-05 14:39:37,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2366 transitions. [2021-06-05 14:39:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:37,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:37,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:37,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7761,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:37,743 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 631 times [2021-06-05 14:39:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:37,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907984065] [2021-06-05 14:39:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907984065] [2021-06-05 14:39:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907984065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871671347] [2021-06-05 14:39:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:39:38,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 14:39:38,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:38,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,510 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 14:39:38,510 INFO L628 ElimStorePlain]: treesize reduction 164, result has 45.7 percent of original size [2021-06-05 14:39:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:38,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:38,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:38,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:38,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:38,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:38,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:39:38,613 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 14:39:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871671347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:38,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:39:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467600404] [2021-06-05 14:39:38,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:38,850 INFO L87 Difference]: Start difference. First operand 721 states and 2366 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,111 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 14:39:39,293 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 14:39:39,458 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 14:39:39,647 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:39:39,838 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 14:39:39,994 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 14:39:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:40,082 INFO L93 Difference]: Finished difference Result 1233 states and 3826 transitions. [2021-06-05 14:39:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:40,084 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:39:40,084 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 14:39:40,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1330.6ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 14:39:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 748. [2021-06-05 14:39:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.321285140562249) internal successors, (2481), 747 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2481 transitions. [2021-06-05 14:39:40,094 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2481 transitions. Word has length 21 [2021-06-05 14:39:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:40,094 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2481 transitions. [2021-06-05 14:39:40,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2481 transitions. [2021-06-05 14:39:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:40,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:40,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:40,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7777,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,295 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 632 times [2021-06-05 14:39:40,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:40,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233082151] [2021-06-05 14:39:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233082151] [2021-06-05 14:39:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233082151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257488189] [2021-06-05 14:39:40,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:40,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:40,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:40,923 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_241, v_prenex_243], 1=[v_prenex_242, nondet_0]} [2021-06-05 14:39:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:40,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:40,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:40,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:40,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,054 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:39:41,054 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-06-05 14:39:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:41,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,145 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-06-05 14:39:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:41,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:41,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:41,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:39:41,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:41,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:41,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:41,262 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:39:41,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:39:41,264 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 14:39:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257488189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:41,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:39:41,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860174623] [2021-06-05 14:39:41,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:39:41,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:39:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:39:41,426 INFO L87 Difference]: Start difference. First operand 748 states and 2481 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,693 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:39:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:42,964 INFO L93 Difference]: Finished difference Result 1339 states and 4052 transitions. [2021-06-05 14:39:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:42,965 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 14:39:42,966 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 14:39:42,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1478.7ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:39:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 14:39:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 755. [2021-06-05 14:39:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.297082228116711) internal successors, (2486), 754 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2486 transitions. [2021-06-05 14:39:42,975 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2486 transitions. Word has length 21 [2021-06-05 14:39:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:42,975 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2486 transitions. [2021-06-05 14:39:42,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2486 transitions. [2021-06-05 14:39:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:42,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:42,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:43,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7838 [2021-06-05 14:39:43,176 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 633 times [2021-06-05 14:39:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:43,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375116469] [2021-06-05 14:39:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375116469] [2021-06-05 14:39:43,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375116469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434903023] [2021-06-05 14:39:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:43,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:43,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:43,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:43,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:43,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:43,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:43,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:43,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:43,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:43,642 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 14:39:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434903023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:43,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:39:43,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555648803] [2021-06-05 14:39:43,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:39:43,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:39:43,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:43,834 INFO L87 Difference]: Start difference. First operand 755 states and 2486 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,139 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 14:39:45,496 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 14:39:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:45,591 INFO L93 Difference]: Finished difference Result 1546 states and 4721 transitions. [2021-06-05 14:39:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:39:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:45,593 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 14:39:45,593 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 14:39:45,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1540.2ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:39:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 14:39:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 748. [2021-06-05 14:39:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.2918340026773762) internal successors, (2459), 747 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2459 transitions. [2021-06-05 14:39:45,604 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2459 transitions. Word has length 21 [2021-06-05 14:39:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:45,604 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2459 transitions. [2021-06-05 14:39:45,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2459 transitions. [2021-06-05 14:39:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:39:45,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:45,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:45,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7902,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:45,805 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 634 times [2021-06-05 14:39:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:45,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222095947] [2021-06-05 14:39:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:45,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222095947] [2021-06-05 14:39:45,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222095947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932476223] [2021-06-05 14:39:45,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:46,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:39:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:46,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:46,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:46,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:39:46,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:46,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:39:46,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:46,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:46,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:39:46,211 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 14:39:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932476223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:46,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:39:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239578371] [2021-06-05 14:39:46,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:39:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:39:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:46,384 INFO L87 Difference]: Start difference. First operand 748 states and 2459 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,500 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 14:39:47,784 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 14:39:48,442 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 14:39:48,834 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 14:39:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:48,934 INFO L93 Difference]: Finished difference Result 1789 states and 5418 transitions. [2021-06-05 14:39:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:39:48,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:39:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:48,936 INFO L225 Difference]: With dead ends: 1789 [2021-06-05 14:39:48,936 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 14:39:48,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2253.7ms TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:39:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 14:39:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 776. [2021-06-05 14:39:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.287741935483871) internal successors, (2548), 775 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2548 transitions. [2021-06-05 14:39:48,948 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2548 transitions. Word has length 21 [2021-06-05 14:39:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:48,948 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2548 transitions. [2021-06-05 14:39:48,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2548 transitions. [2021-06-05 14:39:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:48,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:48,949 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:49,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7921,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:49,149 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1507938877, now seen corresponding path program 635 times [2021-06-05 14:39:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661421324] [2021-06-05 14:39:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661421324] [2021-06-05 14:39:49,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661421324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946033210] [2021-06-05 14:39:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:49,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:49,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:39:49,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:49,410 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:39:49,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:39:49,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:39:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946033210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:49,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:39:49,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196689769] [2021-06-05 14:39:49,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:39:49,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:49,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:39:49,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:39:49,452 INFO L87 Difference]: Start difference. First operand 776 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:49,807 INFO L93 Difference]: Finished difference Result 1186 states and 3742 transitions. [2021-06-05 14:39:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:49,808 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 14:39:49,808 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 14:39:49,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 14:39:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2021-06-05 14:39:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.3031088082901556) internal successors, (2550), 772 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2550 transitions. [2021-06-05 14:39:49,818 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2550 transitions. Word has length 22 [2021-06-05 14:39:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:49,818 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2550 transitions. [2021-06-05 14:39:49,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2550 transitions. [2021-06-05 14:39:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:49,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:49,819 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:50,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7933,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:50,019 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash -955884418, now seen corresponding path program 636 times [2021-06-05 14:39:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313174270] [2021-06-05 14:39:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:50,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313174270] [2021-06-05 14:39:50,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313174270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651787911] [2021-06-05 14:39:50,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:50,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:50,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:50,461 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_247], 1=[v_prenex_251, v_prenex_249]} [2021-06-05 14:39:50,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:50,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,510 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-06-05 14:39:50,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:39:50,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:50,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:50,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:50,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:39:50,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:50,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:39:50,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-06-05 14:39:50,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:39:50,555 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 14:39:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651787911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:50,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:50,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345853901] [2021-06-05 14:39:50,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:50,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:50,604 INFO L87 Difference]: Start difference. First operand 773 states and 2550 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:51,369 INFO L93 Difference]: Finished difference Result 1181 states and 3688 transitions. [2021-06-05 14:39:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:51,370 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 14:39:51,370 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 14:39:51,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 14:39:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 795. [2021-06-05 14:39:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.2808564231738035) internal successors, (2605), 794 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2605 transitions. [2021-06-05 14:39:51,380 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2605 transitions. Word has length 22 [2021-06-05 14:39:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:51,380 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2605 transitions. [2021-06-05 14:39:51,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2605 transitions. [2021-06-05 14:39:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:51,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:51,381 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:51,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7937,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:51,582 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 202759112, now seen corresponding path program 637 times [2021-06-05 14:39:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:51,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391544891] [2021-06-05 14:39:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391544891] [2021-06-05 14:39:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391544891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625131987] [2021-06-05 14:39:51,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:52,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:52,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:52,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:52,025 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:39:52,025 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:39:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:39:52,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:39:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625131987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:52,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:52,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758813429] [2021-06-05 14:39:52,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:52,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:52,082 INFO L87 Difference]: Start difference. First operand 795 states and 2605 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:52,705 INFO L93 Difference]: Finished difference Result 1233 states and 3809 transitions. [2021-06-05 14:39:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:52,706 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:39:52,706 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 14:39:52,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 14:39:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 798. [2021-06-05 14:39:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.282308657465496) internal successors, (2616), 797 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2616 transitions. [2021-06-05 14:39:52,717 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2616 transitions. Word has length 22 [2021-06-05 14:39:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:52,717 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2616 transitions. [2021-06-05 14:39:52,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2616 transitions. [2021-06-05 14:39:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:52,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:52,718 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:52,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7952,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:52,929 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1291148610, now seen corresponding path program 638 times [2021-06-05 14:39:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883172135] [2021-06-05 14:39:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:53,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883172135] [2021-06-05 14:39:53,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883172135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900639310] [2021-06-05 14:39:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:53,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:53,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:53,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:39:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:39:53,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:39:53,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:39:53,414 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:39:53,414 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-05 14:39:53,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:39:53,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:39:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900639310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:53,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:53,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044739871] [2021-06-05 14:39:53,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:53,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:53,470 INFO L87 Difference]: Start difference. First operand 798 states and 2616 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:54,125 INFO L93 Difference]: Finished difference Result 1190 states and 3706 transitions. [2021-06-05 14:39:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:54,126 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 14:39:54,126 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 14:39:54,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 633.6ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 14:39:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 790. [2021-06-05 14:39:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.285171102661597) internal successors, (2592), 789 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2592 transitions. [2021-06-05 14:39:54,136 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2592 transitions. Word has length 22 [2021-06-05 14:39:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:54,136 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2592 transitions. [2021-06-05 14:39:54,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2592 transitions. [2021-06-05 14:39:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:54,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:54,137 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:54,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7968,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,338 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1296850700, now seen corresponding path program 639 times [2021-06-05 14:39:54,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:54,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403242965] [2021-06-05 14:39:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:54,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403242965] [2021-06-05 14:39:54,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403242965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202255352] [2021-06-05 14:39:54,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202255352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:54,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732876078] [2021-06-05 14:39:54,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:54,927 INFO L87 Difference]: Start difference. First operand 790 states and 2592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:55,665 INFO L93 Difference]: Finished difference Result 1167 states and 3629 transitions. [2021-06-05 14:39:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:55,667 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 14:39:55,667 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:39:55,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:39:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 796. [2021-06-05 14:39:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.288050314465409) internal successors, (2614), 795 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2614 transitions. [2021-06-05 14:39:55,676 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2614 transitions. Word has length 22 [2021-06-05 14:39:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:55,676 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2614 transitions. [2021-06-05 14:39:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2614 transitions. [2021-06-05 14:39:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:55,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:55,677 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7985 [2021-06-05 14:39:55,878 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -197057022, now seen corresponding path program 640 times [2021-06-05 14:39:55,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:55,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075660232] [2021-06-05 14:39:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:55,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075660232] [2021-06-05 14:39:55,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075660232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028046265] [2021-06-05 14:39:55,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:56,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:56,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:56,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028046265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:56,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234683172] [2021-06-05 14:39:56,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:56,442 INFO L87 Difference]: Start difference. First operand 796 states and 2614 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,029 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 14:39:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:57,221 INFO L93 Difference]: Finished difference Result 1173 states and 3636 transitions. [2021-06-05 14:39:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:57,223 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 14:39:57,223 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:39:57,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:39:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 793. [2021-06-05 14:39:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.2866161616161618) internal successors, (2603), 792 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2603 transitions. [2021-06-05 14:39:57,234 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2603 transitions. Word has length 22 [2021-06-05 14:39:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:57,234 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2603 transitions. [2021-06-05 14:39:57,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2603 transitions. [2021-06-05 14:39:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:57,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:57,235 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:57,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8001,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,435 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash 340798556, now seen corresponding path program 641 times [2021-06-05 14:39:57,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:57,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809593199] [2021-06-05 14:39:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:57,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809593199] [2021-06-05 14:39:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809593199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84786964] [2021-06-05 14:39:57,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84786964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:57,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:57,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272427444] [2021-06-05 14:39:57,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:57,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:57,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:57,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:57,979 INFO L87 Difference]: Start difference. First operand 793 states and 2603 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:58,766 INFO L93 Difference]: Finished difference Result 1131 states and 3541 transitions. [2021-06-05 14:39:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:58,768 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 14:39:58,768 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:39:58,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:39:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-05 14:39:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.282828282828283) internal successors, (2600), 792 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2600 transitions. [2021-06-05 14:39:58,778 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2600 transitions. Word has length 22 [2021-06-05 14:39:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:58,778 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2600 transitions. [2021-06-05 14:39:58,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2600 transitions. [2021-06-05 14:39:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:58,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:58,779 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:58,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8022 [2021-06-05 14:39:58,979 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:58,979 INFO L82 PathProgramCache]: Analyzing trace with hash 853951560, now seen corresponding path program 642 times [2021-06-05 14:39:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:58,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673133541] [2021-06-05 14:39:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673133541] [2021-06-05 14:39:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673133541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563454490] [2021-06-05 14:39:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:59,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:39:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563454490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:59,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:39:59,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692871530] [2021-06-05 14:39:59,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:39:59,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:59,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:39:59,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:39:59,529 INFO L87 Difference]: Start difference. First operand 793 states and 2600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,015 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:40:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:00,329 INFO L93 Difference]: Finished difference Result 1164 states and 3618 transitions. [2021-06-05 14:40:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:00,330 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 14:40:00,330 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 14:40:00,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 810.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 14:40:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 802. [2021-06-05 14:40:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.2871410736579274) internal successors, (2633), 801 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2633 transitions. [2021-06-05 14:40:00,340 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2633 transitions. Word has length 22 [2021-06-05 14:40:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:00,340 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2633 transitions. [2021-06-05 14:40:00,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2633 transitions. [2021-06-05 14:40:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:00,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:00,341 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:00,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8042,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,542 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash -639956162, now seen corresponding path program 643 times [2021-06-05 14:40:00,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:00,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760523669] [2021-06-05 14:40:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:00,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760523669] [2021-06-05 14:40:00,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760523669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607419028] [2021-06-05 14:40:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:01,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607419028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:01,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:01,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:01,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131818229] [2021-06-05 14:40:01,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:01,138 INFO L87 Difference]: Start difference. First operand 802 states and 2633 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:01,792 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 14:40:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:02,049 INFO L93 Difference]: Finished difference Result 1170 states and 3625 transitions. [2021-06-05 14:40:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:02,051 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 14:40:02,051 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 14:40:02,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 902.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:02,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 14:40:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 799. [2021-06-05 14:40:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.2857142857142856) internal successors, (2622), 798 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2622 transitions. [2021-06-05 14:40:02,061 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2622 transitions. Word has length 22 [2021-06-05 14:40:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:02,061 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2622 transitions. [2021-06-05 14:40:02,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2622 transitions. [2021-06-05 14:40:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:02,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:02,062 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:02,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 668 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8059 [2021-06-05 14:40:02,262 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -102100584, now seen corresponding path program 644 times [2021-06-05 14:40:02,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:02,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855217721] [2021-06-05 14:40:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855217721] [2021-06-05 14:40:02,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855217721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459245650] [2021-06-05 14:40:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459245650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:02,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:02,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301424641] [2021-06-05 14:40:02,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:02,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:02,829 INFO L87 Difference]: Start difference. First operand 799 states and 2622 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,336 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:40:03,491 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:40:03,636 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-06-05 14:40:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:03,720 INFO L93 Difference]: Finished difference Result 1134 states and 3543 transitions. [2021-06-05 14:40:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:03,722 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 14:40:03,722 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 14:40:03,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 918.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 14:40:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 796. [2021-06-05 14:40:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.2842767295597484) internal successors, (2611), 795 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2611 transitions. [2021-06-05 14:40:03,732 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2611 transitions. Word has length 22 [2021-06-05 14:40:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:03,732 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2611 transitions. [2021-06-05 14:40:03,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2611 transitions. [2021-06-05 14:40:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:03,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:03,733 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:03,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8078 [2021-06-05 14:40:03,933 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -608446850, now seen corresponding path program 645 times [2021-06-05 14:40:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:03,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448039542] [2021-06-05 14:40:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448039542] [2021-06-05 14:40:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448039542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325649619] [2021-06-05 14:40:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325649619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:04,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:04,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300483342] [2021-06-05 14:40:04,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:04,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:04,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:04,517 INFO L87 Difference]: Start difference. First operand 796 states and 2611 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,094 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:40:05,278 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 14:40:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:05,452 INFO L93 Difference]: Finished difference Result 1125 states and 3519 transitions. [2021-06-05 14:40:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:05,454 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 14:40:05,454 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 14:40:05,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 14:40:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 796. [2021-06-05 14:40:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.280503144654088) internal successors, (2608), 795 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2608 transitions. [2021-06-05 14:40:05,464 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2608 transitions. Word has length 22 [2021-06-05 14:40:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:05,465 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2608 transitions. [2021-06-05 14:40:05,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2608 transitions. [2021-06-05 14:40:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:05,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:05,466 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:05,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8093,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,666 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash -835991344, now seen corresponding path program 646 times [2021-06-05 14:40:05,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:05,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249646165] [2021-06-05 14:40:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:05,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249646165] [2021-06-05 14:40:05,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249646165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679812074] [2021-06-05 14:40:05,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:05,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679812074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:06,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:06,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447068486] [2021-06-05 14:40:06,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:06,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:06,317 INFO L87 Difference]: Start difference. First operand 796 states and 2608 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,738 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:40:06,913 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 14:40:07,090 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:40:07,251 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 14:40:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:07,435 INFO L93 Difference]: Finished difference Result 1221 states and 3760 transitions. [2021-06-05 14:40:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:07,437 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 14:40:07,437 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 14:40:07,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 14:40:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 808. [2021-06-05 14:40:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.2862453531598512) internal successors, (2652), 807 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2652 transitions. [2021-06-05 14:40:07,447 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2652 transitions. Word has length 22 [2021-06-05 14:40:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:07,447 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2652 transitions. [2021-06-05 14:40:07,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2652 transitions. [2021-06-05 14:40:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:07,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:07,448 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:07,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8108,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,649 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1965068230, now seen corresponding path program 647 times [2021-06-05 14:40:07,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:07,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147751767] [2021-06-05 14:40:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147751767] [2021-06-05 14:40:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147751767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660994579] [2021-06-05 14:40:07,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:07,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:08,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660994579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:08,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:08,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819032239] [2021-06-05 14:40:08,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:08,288 INFO L87 Difference]: Start difference. First operand 808 states and 2652 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,661 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 14:40:08,831 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-06-05 14:40:09,007 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-05 14:40:09,180 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 14:40:09,359 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 14:40:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:09,388 INFO L93 Difference]: Finished difference Result 1227 states and 3767 transitions. [2021-06-05 14:40:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:09,389 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 14:40:09,389 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 14:40:09,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 14:40:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 805. [2021-06-05 14:40:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.2848258706467663) internal successors, (2641), 804 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2641 transitions. [2021-06-05 14:40:09,400 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2641 transitions. Word has length 22 [2021-06-05 14:40:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:09,400 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2641 transitions. [2021-06-05 14:40:09,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2641 transitions. [2021-06-05 14:40:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:09,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:09,401 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:09,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8123 [2021-06-05 14:40:09,610 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1792043488, now seen corresponding path program 648 times [2021-06-05 14:40:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079941795] [2021-06-05 14:40:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079941795] [2021-06-05 14:40:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079941795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286057034] [2021-06-05 14:40:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286057034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:10,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653994576] [2021-06-05 14:40:10,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:10,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:10,226 INFO L87 Difference]: Start difference. First operand 805 states and 2641 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,691 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 14:40:10,877 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 14:40:11,069 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:40:11,242 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 14:40:11,410 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 14:40:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:11,428 INFO L93 Difference]: Finished difference Result 1191 states and 3685 transitions. [2021-06-05 14:40:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:11,430 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 14:40:11,430 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 14:40:11,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1203.9ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 14:40:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 802. [2021-06-05 14:40:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.2833957553058677) internal successors, (2630), 801 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2630 transitions. [2021-06-05 14:40:11,440 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2630 transitions. Word has length 22 [2021-06-05 14:40:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:11,440 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2630 transitions. [2021-06-05 14:40:11,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2630 transitions. [2021-06-05 14:40:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:11,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:11,441 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:11,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8141,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:11,642 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1996577542, now seen corresponding path program 649 times [2021-06-05 14:40:11,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:11,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258539149] [2021-06-05 14:40:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:11,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258539149] [2021-06-05 14:40:11,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258539149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993236585] [2021-06-05 14:40:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993236585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:12,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041805241] [2021-06-05 14:40:12,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:12,207 INFO L87 Difference]: Start difference. First operand 802 states and 2630 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,093 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-06-05 14:40:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,223 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2021-06-05 14:40:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,225 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 14:40:13,225 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 14:40:13,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 14:40:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 799. [2021-06-05 14:40:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.281954887218045) internal successors, (2619), 798 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2619 transitions. [2021-06-05 14:40:13,235 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2619 transitions. Word has length 22 [2021-06-05 14:40:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,235 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2619 transitions. [2021-06-05 14:40:13,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2619 transitions. [2021-06-05 14:40:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:13,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,236 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8155 [2021-06-05 14:40:13,437 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1258153956, now seen corresponding path program 650 times [2021-06-05 14:40:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257677242] [2021-06-05 14:40:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257677242] [2021-06-05 14:40:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257677242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920099197] [2021-06-05 14:40:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:13,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920099197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:14,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:14,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840102321] [2021-06-05 14:40:14,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:14,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:14,042 INFO L87 Difference]: Start difference. First operand 799 states and 2619 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,523 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 14:40:14,712 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-05 14:40:14,907 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-05 14:40:15,074 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-05 14:40:15,226 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 14:40:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:15,249 INFO L93 Difference]: Finished difference Result 1179 states and 3650 transitions. [2021-06-05 14:40:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:15,251 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 14:40:15,251 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 14:40:15,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1205.9ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 14:40:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 799. [2021-06-05 14:40:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.2781954887218046) internal successors, (2616), 798 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2616 transitions. [2021-06-05 14:40:15,261 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2616 transitions. Word has length 22 [2021-06-05 14:40:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:15,261 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2616 transitions. [2021-06-05 14:40:15,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2616 transitions. [2021-06-05 14:40:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:15,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:15,262 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:15,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8168 [2021-06-05 14:40:15,462 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:15,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:15,463 INFO L82 PathProgramCache]: Analyzing trace with hash 644309949, now seen corresponding path program 651 times [2021-06-05 14:40:15,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:15,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757243661] [2021-06-05 14:40:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757243661] [2021-06-05 14:40:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757243661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795780106] [2021-06-05 14:40:15,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:15,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:15,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:15,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:15,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:15,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:15,735 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:40:15,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:15,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:40:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795780106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:15,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:40:15,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825318194] [2021-06-05 14:40:15,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:15,777 INFO L87 Difference]: Start difference. First operand 799 states and 2616 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:16,154 INFO L93 Difference]: Finished difference Result 1303 states and 4070 transitions. [2021-06-05 14:40:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:16,156 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 14:40:16,156 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 14:40:16,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 14:40:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 806. [2021-06-05 14:40:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2857142857142856) internal successors, (2645), 805 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 14:40:16,166 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 14:40:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:16,166 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 14:40:16,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 14:40:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:16,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:16,167 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:16,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8187 [2021-06-05 14:40:16,367 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash -8767304, now seen corresponding path program 652 times [2021-06-05 14:40:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:16,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139537051] [2021-06-05 14:40:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139537051] [2021-06-05 14:40:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139537051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412891986] [2021-06-05 14:40:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:16,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:16,855 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_309, nondet_0], 1=[v_prenex_310, v_prenex_313]} [2021-06-05 14:40:16,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:16,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,904 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-06-05 14:40:16,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:16,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:16,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:16,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:16,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:16,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:16,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:16,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-06-05 14:40:16,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:16,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 14:40:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412891986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:16,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826707687] [2021-06-05 14:40:16,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:16,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:16,999 INFO L87 Difference]: Start difference. First operand 806 states and 2645 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,696 INFO L93 Difference]: Finished difference Result 1256 states and 3898 transitions. [2021-06-05 14:40:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,698 INFO L225 Difference]: With dead ends: 1256 [2021-06-05 14:40:17,698 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 14:40:17,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 14:40:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 821. [2021-06-05 14:40:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.273170731707317) internal successors, (2684), 820 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2684 transitions. [2021-06-05 14:40:17,708 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2684 transitions. Word has length 22 [2021-06-05 14:40:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,708 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2684 transitions. [2021-06-05 14:40:17,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2684 transitions. [2021-06-05 14:40:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:17,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,709 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:17,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8192,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:17,910 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1149876226, now seen corresponding path program 653 times [2021-06-05 14:40:17,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:17,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129218780] [2021-06-05 14:40:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129218780] [2021-06-05 14:40:18,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129218780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879330211] [2021-06-05 14:40:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:18,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:18,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:18,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:18,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:18,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:40:18,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:18,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:18,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:18,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:18,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:18,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:18,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:18,445 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 14:40:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879330211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:18,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:18,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228876701] [2021-06-05 14:40:18,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:18,500 INFO L87 Difference]: Start difference. First operand 821 states and 2684 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:19,219 INFO L93 Difference]: Finished difference Result 1308 states and 4019 transitions. [2021-06-05 14:40:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:19,221 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 14:40:19,221 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:40:19,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:40:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 824. [2021-06-05 14:40:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.27460510328068) internal successors, (2695), 823 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2695 transitions. [2021-06-05 14:40:19,232 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2695 transitions. Word has length 22 [2021-06-05 14:40:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:19,232 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2695 transitions. [2021-06-05 14:40:19,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2695 transitions. [2021-06-05 14:40:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:19,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:19,233 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:19,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8207,678 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,433 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash -344031496, now seen corresponding path program 654 times [2021-06-05 14:40:19,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:19,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108233194] [2021-06-05 14:40:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:19,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108233194] [2021-06-05 14:40:19,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108233194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711253712] [2021-06-05 14:40:19,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:19,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:19,890 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_327, v_prenex_323], 1=[nondet_0, v_prenex_324]} [2021-06-05 14:40:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:19,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,939 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-06-05 14:40:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:19,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:19,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:19,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:19,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:19,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:19,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-05 14:40:19,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:19,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 14:40:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711253712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:20,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:20,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567987318] [2021-06-05 14:40:20,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:20,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:20,038 INFO L87 Difference]: Start difference. First operand 824 states and 2695 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:20,757 INFO L93 Difference]: Finished difference Result 1265 states and 3916 transitions. [2021-06-05 14:40:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:20,759 INFO L225 Difference]: With dead ends: 1265 [2021-06-05 14:40:20,759 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 14:40:20,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 14:40:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 816. [2021-06-05 14:40:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.2773006134969327) internal successors, (2671), 815 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2671 transitions. [2021-06-05 14:40:20,769 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2671 transitions. Word has length 22 [2021-06-05 14:40:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:20,769 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2671 transitions. [2021-06-05 14:40:20,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2671 transitions. [2021-06-05 14:40:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:20,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:20,770 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:20,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8226 [2021-06-05 14:40:20,971 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2050999482, now seen corresponding path program 655 times [2021-06-05 14:40:20,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:20,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399651181] [2021-06-05 14:40:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:21,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399651181] [2021-06-05 14:40:21,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399651181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136424072] [2021-06-05 14:40:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136424072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:21,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161046992] [2021-06-05 14:40:21,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:21,607 INFO L87 Difference]: Start difference. First operand 816 states and 2671 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:22,436 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2021-06-05 14:40:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:22,438 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 14:40:22,438 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:40:22,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:40:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 822. [2021-06-05 14:40:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.2801461632155906) internal successors, (2693), 821 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2693 transitions. [2021-06-05 14:40:22,448 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2693 transitions. Word has length 22 [2021-06-05 14:40:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:22,448 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2693 transitions. [2021-06-05 14:40:22,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2693 transitions. [2021-06-05 14:40:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:22,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:22,449 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:22,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-05 14:40:22,650 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash 750060092, now seen corresponding path program 656 times [2021-06-05 14:40:22,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:22,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462647470] [2021-06-05 14:40:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:22,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462647470] [2021-06-05 14:40:22,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462647470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784291096] [2021-06-05 14:40:22,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:22,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:22,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784291096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:23,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:23,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517440732] [2021-06-05 14:40:23,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:23,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:23,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:23,245 INFO L87 Difference]: Start difference. First operand 822 states and 2693 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:24,017 INFO L93 Difference]: Finished difference Result 1214 states and 3758 transitions. [2021-06-05 14:40:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:24,018 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 14:40:24,018 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:40:24,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:40:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 819. [2021-06-05 14:40:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.2787286063569683) internal successors, (2682), 818 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2682 transitions. [2021-06-05 14:40:24,028 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2682 transitions. Word has length 22 [2021-06-05 14:40:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:24,029 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2682 transitions. [2021-06-05 14:40:24,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2682 transitions. [2021-06-05 14:40:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:24,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:24,029 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:24,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8254,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,230 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1287915670, now seen corresponding path program 657 times [2021-06-05 14:40:24,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:24,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661488892] [2021-06-05 14:40:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:24,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661488892] [2021-06-05 14:40:24,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661488892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426617562] [2021-06-05 14:40:24,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:24,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426617562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:24,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023822796] [2021-06-05 14:40:24,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:24,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:24,865 INFO L87 Difference]: Start difference. First operand 819 states and 2682 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,541 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-06-05 14:40:25,722 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-06-05 14:40:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:25,806 INFO L93 Difference]: Finished difference Result 1172 states and 3663 transitions. [2021-06-05 14:40:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:25,808 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 14:40:25,808 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 14:40:25,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 14:40:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 811. [2021-06-05 14:40:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.2814814814814817) internal successors, (2658), 810 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2658 transitions. [2021-06-05 14:40:25,818 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2658 transitions. Word has length 22 [2021-06-05 14:40:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:25,818 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2658 transitions. [2021-06-05 14:40:25,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2658 transitions. [2021-06-05 14:40:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:25,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:25,819 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:26,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8272,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,019 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1801068674, now seen corresponding path program 658 times [2021-06-05 14:40:26,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:26,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113644160] [2021-06-05 14:40:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:26,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113644160] [2021-06-05 14:40:26,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113644160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429465037] [2021-06-05 14:40:26,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429465037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:26,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647267991] [2021-06-05 14:40:26,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:26,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:26,640 INFO L87 Difference]: Start difference. First operand 811 states and 2658 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,213 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-06-05 14:40:27,370 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 14:40:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:27,584 INFO L93 Difference]: Finished difference Result 1197 states and 3719 transitions. [2021-06-05 14:40:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:27,586 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 14:40:27,586 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 14:40:27,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 14:40:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 820. [2021-06-05 14:40:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.2857142857142856) internal successors, (2691), 819 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2691 transitions. [2021-06-05 14:40:27,596 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2691 transitions. Word has length 22 [2021-06-05 14:40:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:27,596 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2691 transitions. [2021-06-05 14:40:27,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2691 transitions. [2021-06-05 14:40:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:27,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:27,597 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8293 [2021-06-05 14:40:27,797 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 307160952, now seen corresponding path program 659 times [2021-06-05 14:40:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881942433] [2021-06-05 14:40:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881942433] [2021-06-05 14:40:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881942433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740123664] [2021-06-05 14:40:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:28,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740123664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:28,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835160032] [2021-06-05 14:40:28,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:28,405 INFO L87 Difference]: Start difference. First operand 820 states and 2691 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,947 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-06-05 14:40:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:29,280 INFO L93 Difference]: Finished difference Result 1203 states and 3726 transitions. [2021-06-05 14:40:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:29,282 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 14:40:29,282 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 14:40:29,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 14:40:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 817. [2021-06-05 14:40:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.284313725490196) internal successors, (2680), 816 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2680 transitions. [2021-06-05 14:40:29,297 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2680 transitions. Word has length 22 [2021-06-05 14:40:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:29,297 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2680 transitions. [2021-06-05 14:40:29,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2680 transitions. [2021-06-05 14:40:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:29,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:29,298 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:29,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8305,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,499 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash 845016530, now seen corresponding path program 660 times [2021-06-05 14:40:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:29,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929882692] [2021-06-05 14:40:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929882692] [2021-06-05 14:40:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929882692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619485056] [2021-06-05 14:40:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:29,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619485056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:30,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:30,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:30,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558212152] [2021-06-05 14:40:30,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:30,158 INFO L87 Difference]: Start difference. First operand 817 states and 2680 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,650 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2021-06-05 14:40:30,796 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:40:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:31,014 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-06-05 14:40:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:31,016 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 14:40:31,016 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 14:40:31,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 14:40:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 814. [2021-06-05 14:40:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.2829028290282904) internal successors, (2669), 813 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2669 transitions. [2021-06-05 14:40:31,026 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2669 transitions. Word has length 22 [2021-06-05 14:40:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:31,026 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2669 transitions. [2021-06-05 14:40:31,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2669 transitions. [2021-06-05 14:40:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:31,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:31,027 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:31,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8319 [2021-06-05 14:40:31,227 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash 338670264, now seen corresponding path program 661 times [2021-06-05 14:40:31,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:31,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048604038] [2021-06-05 14:40:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:31,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048604038] [2021-06-05 14:40:31,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048604038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021668520] [2021-06-05 14:40:31,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021668520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:31,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:31,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754035790] [2021-06-05 14:40:31,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:31,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:31,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:31,809 INFO L87 Difference]: Start difference. First operand 814 states and 2669 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:32,619 INFO L93 Difference]: Finished difference Result 1158 states and 3620 transitions. [2021-06-05 14:40:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:32,621 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 14:40:32,621 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 14:40:32,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 823.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 14:40:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 806. [2021-06-05 14:40:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2857142857142856) internal successors, (2645), 805 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 14:40:32,631 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 14:40:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:32,631 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 14:40:32,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 14:40:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:32,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:32,632 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:32,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8332,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:32,832 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1633724579, now seen corresponding path program 662 times [2021-06-05 14:40:32,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:32,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366400833] [2021-06-05 14:40:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:32,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366400833] [2021-06-05 14:40:32,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366400833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169127833] [2021-06-05 14:40:32,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:33,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:33,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:33,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:33,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:33,134 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:40:33,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:33,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:40:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169127833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:40:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572710832] [2021-06-05 14:40:33,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:33,178 INFO L87 Difference]: Start difference. First operand 806 states and 2645 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:33,604 INFO L93 Difference]: Finished difference Result 1193 states and 3775 transitions. [2021-06-05 14:40:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:33,606 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 14:40:33,606 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:40:33,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:40:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 813. [2021-06-05 14:40:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 14:40:33,616 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 14:40:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:33,616 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 14:40:33,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 14:40:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:33,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:33,617 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:33,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8345 [2021-06-05 14:40:33,817 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:33,817 INFO L82 PathProgramCache]: Analyzing trace with hash -407865598, now seen corresponding path program 663 times [2021-06-05 14:40:33,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:33,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632125409] [2021-06-05 14:40:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632125409] [2021-06-05 14:40:33,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632125409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597559859] [2021-06-05 14:40:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:40:34,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,355 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:40:34,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:34,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:34,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:34,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:34,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:40:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597559859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585581146] [2021-06-05 14:40:34,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:34,417 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:35,210 INFO L93 Difference]: Finished difference Result 1258 states and 3914 transitions. [2021-06-05 14:40:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:35,212 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 14:40:35,212 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 14:40:35,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 14:40:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 823. [2021-06-05 14:40:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.2846715328467155) internal successors, (2700), 822 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2700 transitions. [2021-06-05 14:40:35,222 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2700 transitions. Word has length 22 [2021-06-05 14:40:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:35,222 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2700 transitions. [2021-06-05 14:40:35,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2700 transitions. [2021-06-05 14:40:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:35,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:35,223 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:35,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8350,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,424 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash 750777932, now seen corresponding path program 664 times [2021-06-05 14:40:35,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:35,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484445779] [2021-06-05 14:40:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:35,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484445779] [2021-06-05 14:40:35,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484445779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534007155] [2021-06-05 14:40:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:35,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:35,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:35,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:40:35,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,955 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:40:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:35,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:35,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:35,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:35,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:40:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534007155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:36,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:36,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774748292] [2021-06-05 14:40:36,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:36,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:36,016 INFO L87 Difference]: Start difference. First operand 823 states and 2700 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:36,813 INFO L93 Difference]: Finished difference Result 1310 states and 4035 transitions. [2021-06-05 14:40:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:36,815 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 14:40:36,815 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 14:40:36,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 14:40:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 826. [2021-06-05 14:40:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.286060606060606) internal successors, (2711), 825 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2711 transitions. [2021-06-05 14:40:36,826 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2711 transitions. Word has length 22 [2021-06-05 14:40:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:36,826 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2711 transitions. [2021-06-05 14:40:36,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2711 transitions. [2021-06-05 14:40:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:36,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:36,827 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:37,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8370 [2021-06-05 14:40:37,028 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash -743129790, now seen corresponding path program 665 times [2021-06-05 14:40:37,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:37,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555150245] [2021-06-05 14:40:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555150245] [2021-06-05 14:40:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555150245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072335820] [2021-06-05 14:40:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:37,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:37,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:37,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:37,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:37,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:37,566 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:40:37,566 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:40:37,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:40:37,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:40:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072335820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:37,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679651307] [2021-06-05 14:40:37,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:37,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:37,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:37,617 INFO L87 Difference]: Start difference. First operand 826 states and 2711 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:38,325 INFO L93 Difference]: Finished difference Result 1267 states and 3932 transitions. [2021-06-05 14:40:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:38,327 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 14:40:38,327 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 14:40:38,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 14:40:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 818. [2021-06-05 14:40:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.2888616891064872) internal successors, (2687), 817 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2687 transitions. [2021-06-05 14:40:38,338 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2687 transitions. Word has length 22 [2021-06-05 14:40:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:38,338 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2687 transitions. [2021-06-05 14:40:38,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2687 transitions. [2021-06-05 14:40:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:38,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:38,339 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:38,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8392 [2021-06-05 14:40:38,539 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1844869520, now seen corresponding path program 666 times [2021-06-05 14:40:38,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:38,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073629093] [2021-06-05 14:40:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:38,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073629093] [2021-06-05 14:40:38,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073629093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080371480] [2021-06-05 14:40:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080371480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:39,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:39,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592159362] [2021-06-05 14:40:39,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:39,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:39,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:39,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:39,166 INFO L87 Difference]: Start difference. First operand 818 states and 2687 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:39,963 INFO L93 Difference]: Finished difference Result 1210 states and 3767 transitions. [2021-06-05 14:40:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:39,965 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:40:39,965 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:40:39,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:40:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 824. [2021-06-05 14:40:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.2916160388821387) internal successors, (2709), 823 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2709 transitions. [2021-06-05 14:40:39,976 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2709 transitions. Word has length 22 [2021-06-05 14:40:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:39,976 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2709 transitions. [2021-06-05 14:40:39,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2709 transitions. [2021-06-05 14:40:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:39,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:39,977 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:40,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8411 [2021-06-05 14:40:40,177 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 350961798, now seen corresponding path program 667 times [2021-06-05 14:40:40,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635313918] [2021-06-05 14:40:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635313918] [2021-06-05 14:40:40,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635313918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590164636] [2021-06-05 14:40:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:40,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590164636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:40,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785252106] [2021-06-05 14:40:40,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:40,764 INFO L87 Difference]: Start difference. First operand 824 states and 2709 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:41,549 INFO L93 Difference]: Finished difference Result 1216 states and 3774 transitions. [2021-06-05 14:40:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:41,551 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 14:40:41,551 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:40:41,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:40:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 821. [2021-06-05 14:40:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.290243902439024) internal successors, (2698), 820 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2698 transitions. [2021-06-05 14:40:41,561 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2698 transitions. Word has length 22 [2021-06-05 14:40:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:41,561 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2698 transitions. [2021-06-05 14:40:41,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2698 transitions. [2021-06-05 14:40:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:41,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:41,562 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8425,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,763 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,763 INFO L82 PathProgramCache]: Analyzing trace with hash 888817376, now seen corresponding path program 668 times [2021-06-05 14:40:41,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447048817] [2021-06-05 14:40:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447048817] [2021-06-05 14:40:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447048817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466415811] [2021-06-05 14:40:41,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:42,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:42,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:42,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:42,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466415811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870310799] [2021-06-05 14:40:42,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:42,422 INFO L87 Difference]: Start difference. First operand 821 states and 2698 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:43,263 INFO L93 Difference]: Finished difference Result 1174 states and 3679 transitions. [2021-06-05 14:40:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:43,265 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 14:40:43,265 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 14:40:43,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 14:40:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 813. [2021-06-05 14:40:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 14:40:43,275 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 14:40:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:43,275 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 14:40:43,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 14:40:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:43,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:43,276 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:43,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8440 [2021-06-05 14:40:43,477 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -875925571, now seen corresponding path program 669 times [2021-06-05 14:40:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:43,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014429929] [2021-06-05 14:40:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:43,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014429929] [2021-06-05 14:40:43,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014429929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361495703] [2021-06-05 14:40:43,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:40:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:43,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:43,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:43,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:43,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:43,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:43,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:43,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:43,803 INFO L628 ElimStorePlain]: treesize reduction 29, result has 49.1 percent of original size [2021-06-05 14:40:43,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:43,804 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-06-05 14:40:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361495703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:43,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:43,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141220200] [2021-06-05 14:40:43,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:43,863 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:44,402 INFO L93 Difference]: Finished difference Result 1284 states and 4007 transitions. [2021-06-05 14:40:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:44,404 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 14:40:44,404 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 14:40:44,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 14:40:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 820. [2021-06-05 14:40:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.3089133089133087) internal successors, (2710), 819 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2710 transitions. [2021-06-05 14:40:44,414 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2710 transitions. Word has length 22 [2021-06-05 14:40:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:44,414 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2710 transitions. [2021-06-05 14:40:44,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2710 transitions. [2021-06-05 14:40:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:44,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:44,415 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:44,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8459,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:44,616 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash 133449592, now seen corresponding path program 670 times [2021-06-05 14:40:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:44,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656298187] [2021-06-05 14:40:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:44,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:44,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656298187] [2021-06-05 14:40:44,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656298187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:44,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52063233] [2021-06-05 14:40:44,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:44,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:45,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:45,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:45,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,144 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 14:40:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:45,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:45,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:45,183 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 14:40:45,183 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 14:40:45,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:45,184 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:40:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52063233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:45,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489225030] [2021-06-05 14:40:45,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:45,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:45,275 INFO L87 Difference]: Start difference. First operand 820 states and 2710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:46,027 INFO L93 Difference]: Finished difference Result 1417 states and 4388 transitions. [2021-06-05 14:40:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:46,029 INFO L225 Difference]: With dead ends: 1417 [2021-06-05 14:40:46,029 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 14:40:46,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 14:40:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 832. [2021-06-05 14:40:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.3104693140794224) internal successors, (2751), 831 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-06-05 14:40:46,040 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-06-05 14:40:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:46,040 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-06-05 14:40:46,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-06-05 14:40:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:46,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:46,041 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8466 [2021-06-05 14:40:46,242 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1292093122, now seen corresponding path program 671 times [2021-06-05 14:40:46,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:46,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572088371] [2021-06-05 14:40:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572088371] [2021-06-05 14:40:46,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572088371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52620585] [2021-06-05 14:40:46,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:46,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:46,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,761 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 14:40:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:46,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:46,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:46,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:46,780 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:40:46,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:46,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:40:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52620585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:46,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:46,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978774615] [2021-06-05 14:40:46,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:46,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:46,875 INFO L87 Difference]: Start difference. First operand 832 states and 2751 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:47,678 INFO L93 Difference]: Finished difference Result 1449 states and 4447 transitions. [2021-06-05 14:40:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:47,680 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 14:40:47,680 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 14:40:47,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 713.5ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 14:40:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 838. [2021-06-05 14:40:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.3166069295101552) internal successors, (2776), 837 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2776 transitions. [2021-06-05 14:40:47,692 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2776 transitions. Word has length 22 [2021-06-05 14:40:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:47,692 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2776 transitions. [2021-06-05 14:40:47,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2776 transitions. [2021-06-05 14:40:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:47,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:47,693 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:47,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8486,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:47,894 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -201814600, now seen corresponding path program 672 times [2021-06-05 14:40:47,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:47,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32937260] [2021-06-05 14:40:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:48,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32937260] [2021-06-05 14:40:48,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32937260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146454014] [2021-06-05 14:40:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:48,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:48,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:48,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,439 INFO L628 ElimStorePlain]: treesize reduction 48, result has 61.9 percent of original size [2021-06-05 14:40:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:48,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:48,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:48,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:48,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:48,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:48,513 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 14:40:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146454014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:48,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031045405] [2021-06-05 14:40:48,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:48,597 INFO L87 Difference]: Start difference. First operand 838 states and 2776 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:49,344 INFO L93 Difference]: Finished difference Result 1406 states and 4338 transitions. [2021-06-05 14:40:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:49,346 INFO L225 Difference]: With dead ends: 1406 [2021-06-05 14:40:49,346 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 14:40:49,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 14:40:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 830. [2021-06-05 14:40:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.319662243667069) internal successors, (2752), 829 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2752 transitions. [2021-06-05 14:40:49,358 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2752 transitions. Word has length 22 [2021-06-05 14:40:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:49,358 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2752 transitions. [2021-06-05 14:40:49,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2752 transitions. [2021-06-05 14:40:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:49,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:49,359 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:49,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8511 [2021-06-05 14:40:49,559 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 543962077, now seen corresponding path program 673 times [2021-06-05 14:40:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:49,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591811467] [2021-06-05 14:40:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:49,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591811467] [2021-06-05 14:40:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591811467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031895797] [2021-06-05 14:40:49,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:49,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:49,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:49,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:49,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:49,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,870 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:40:49,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:49,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 14:40:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031895797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:49,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:40:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014147170] [2021-06-05 14:40:49,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:49,928 INFO L87 Difference]: Start difference. First operand 830 states and 2752 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:50,382 INFO L93 Difference]: Finished difference Result 1192 states and 3728 transitions. [2021-06-05 14:40:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:50,384 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 14:40:50,384 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 14:40:50,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 14:40:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 810. [2021-06-05 14:40:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.289245982694685) internal successors, (2661), 809 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2661 transitions. [2021-06-05 14:40:50,394 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2661 transitions. Word has length 22 [2021-06-05 14:40:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:50,394 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2661 transitions. [2021-06-05 14:40:50,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2661 transitions. [2021-06-05 14:40:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:50,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:50,395 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:50,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8533,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,596 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:50,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1952026690, now seen corresponding path program 674 times [2021-06-05 14:40:50,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:50,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581683285] [2021-06-05 14:40:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:50,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581683285] [2021-06-05 14:40:50,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581683285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519063524] [2021-06-05 14:40:50,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:50,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:51,067 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_426, v_prenex_421, v_prenex_422], 1=[v_prenex_428, nondet_0, v_prenex_423]} [2021-06-05 14:40:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:51,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,200 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:40:51,200 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 14:40:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:51,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:51,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:51,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:51,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:51,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,374 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:40:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:51,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:51,378 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:51,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:51,421 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 14:40:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519063524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:51,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:51,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909836494] [2021-06-05 14:40:51,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:51,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:51,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:51,508 INFO L87 Difference]: Start difference. First operand 810 states and 2661 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:52,323 INFO L93 Difference]: Finished difference Result 1340 states and 4171 transitions. [2021-06-05 14:40:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:52,325 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 14:40:52,325 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:40:52,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:40:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 806. [2021-06-05 14:40:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.283229813664596) internal successors, (2643), 805 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-06-05 14:40:52,341 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 22 [2021-06-05 14:40:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:52,341 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-06-05 14:40:52,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-06-05 14:40:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:52,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:52,342 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:52,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8545 [2021-06-05 14:40:52,542 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -709889214, now seen corresponding path program 675 times [2021-06-05 14:40:52,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:52,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495475557] [2021-06-05 14:40:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495475557] [2021-06-05 14:40:52,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495475557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224775313] [2021-06-05 14:40:52,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:40:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:40:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:53,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:53,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:53,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:40:53,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:53,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:40:53,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:53,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:53,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:53,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:53,202 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:174, output treesize:61 [2021-06-05 14:40:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224775313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:40:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745970930] [2021-06-05 14:40:53,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:40:53,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:40:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:53,367 INFO L87 Difference]: Start difference. First operand 806 states and 2643 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,381 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 14:40:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:54,658 INFO L93 Difference]: Finished difference Result 1285 states and 4035 transitions. [2021-06-05 14:40:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:54,660 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 14:40:54,660 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 14:40:54,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1182.7ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:40:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 14:40:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 800. [2021-06-05 14:40:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.2778473091364204) internal successors, (2619), 799 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2619 transitions. [2021-06-05 14:40:54,671 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2619 transitions. Word has length 22 [2021-06-05 14:40:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:54,671 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2619 transitions. [2021-06-05 14:40:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2619 transitions. [2021-06-05 14:40:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:54,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:54,672 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:54,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8562 [2021-06-05 14:40:54,873 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1378076080, now seen corresponding path program 676 times [2021-06-05 14:40:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:54,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440938363] [2021-06-05 14:40:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:55,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440938363] [2021-06-05 14:40:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440938363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274006888] [2021-06-05 14:40:55,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:55,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:55,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:55,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:55,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:55,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,443 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-06-05 14:40:55,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_440 vanished before elimination [2021-06-05 14:40:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:55,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:55,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:55,463 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:40:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274006888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:55,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:55,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215534150] [2021-06-05 14:40:55,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:55,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:55,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:55,578 INFO L87 Difference]: Start difference. First operand 800 states and 2619 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:56,473 INFO L93 Difference]: Finished difference Result 1364 states and 4234 transitions. [2021-06-05 14:40:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:56,476 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 14:40:56,476 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 14:40:56,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 802.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 14:40:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 808. [2021-06-05 14:40:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.2899628252788102) internal successors, (2655), 807 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2655 transitions. [2021-06-05 14:40:56,487 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2655 transitions. Word has length 22 [2021-06-05 14:40:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:56,487 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2655 transitions. [2021-06-05 14:40:56,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2655 transitions. [2021-06-05 14:40:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:56,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:56,488 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:56,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8579,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,697 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1422983494, now seen corresponding path program 677 times [2021-06-05 14:40:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234713381] [2021-06-05 14:40:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:56,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:56,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234713381] [2021-06-05 14:40:56,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234713381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:56,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706923373] [2021-06-05 14:40:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:57,192 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_445], 1=[v_prenex_448, v_prenex_450, v_prenex_446]} [2021-06-05 14:40:57,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,287 INFO L628 ElimStorePlain]: treesize reduction 72, result has 56.9 percent of original size [2021-06-05 14:40:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:57,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:57,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:57,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:57,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:57,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,434 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-06-05 14:40:57,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_446 vanished before elimination [2021-06-05 14:40:57,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:57,435 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 14:40:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:57,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706923373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:57,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:57,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:57,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883180477] [2021-06-05 14:40:57,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:57,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:57,545 INFO L87 Difference]: Start difference. First operand 808 states and 2655 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:58,426 INFO L93 Difference]: Finished difference Result 1350 states and 4183 transitions. [2021-06-05 14:40:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:58,428 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 14:40:58,429 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 14:40:58,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 14:40:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 805. [2021-06-05 14:40:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.288557213930348) internal successors, (2644), 804 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2644 transitions. [2021-06-05 14:40:58,440 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2644 transitions. Word has length 22 [2021-06-05 14:40:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:58,440 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2644 transitions. [2021-06-05 14:40:58,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2644 transitions. [2021-06-05 14:40:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:58,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:58,441 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:58,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8600,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:58,657 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -626675642, now seen corresponding path program 678 times [2021-06-05 14:40:58,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:58,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162291197] [2021-06-05 14:40:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:58,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162291197] [2021-06-05 14:40:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162291197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78291724] [2021-06-05 14:40:58,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:58,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:40:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:59,227 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_460, v_prenex_455], 1=[nondet_0, v_prenex_456, v_prenex_457]} [2021-06-05 14:40:59,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:59,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,314 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 14:40:59,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 14:40:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:40:59,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:59,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:40:59,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:59,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,424 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-06-05 14:40:59,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_457 vanished before elimination [2021-06-05 14:40:59,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:40:59,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 14:40:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:59,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78291724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:59,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:59,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:40:59,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512753180] [2021-06-05 14:40:59,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:40:59,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:40:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:59,545 INFO L87 Difference]: Start difference. First operand 805 states and 2644 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:00,603 INFO L93 Difference]: Finished difference Result 1393 states and 4296 transitions. [2021-06-05 14:41:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:00,605 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 14:41:00,605 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 14:41:00,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 953.4ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 14:41:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 801. [2021-06-05 14:41:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.28) internal successors, (2624), 800 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2624 transitions. [2021-06-05 14:41:00,615 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2624 transitions. Word has length 22 [2021-06-05 14:41:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:00,615 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2624 transitions. [2021-06-05 14:41:00,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2624 transitions. [2021-06-05 14:41:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:00,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:00,616 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:00,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8619 [2021-06-05 14:41:00,817 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash -605939114, now seen corresponding path program 679 times [2021-06-05 14:41:00,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:00,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558636427] [2021-06-05 14:41:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:00,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558636427] [2021-06-05 14:41:00,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558636427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930464551] [2021-06-05 14:41:00,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:01,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:41:01,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:01,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,326 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 14:41:01,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-06-05 14:41:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:41:01,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:01,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:01,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:01,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:41:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930464551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:01,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:01,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136021582] [2021-06-05 14:41:01,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:01,438 INFO L87 Difference]: Start difference. First operand 801 states and 2624 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:02,456 INFO L93 Difference]: Finished difference Result 1299 states and 4050 transitions. [2021-06-05 14:41:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:02,458 INFO L225 Difference]: With dead ends: 1299 [2021-06-05 14:41:02,458 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 14:41:02,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 895.3ms TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 14:41:02,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 803. [2021-06-05 14:41:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.2780548628428927) internal successors, (2629), 802 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2629 transitions. [2021-06-05 14:41:02,468 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2629 transitions. Word has length 22 [2021-06-05 14:41:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:02,468 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2629 transitions. [2021-06-05 14:41:02,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2629 transitions. [2021-06-05 14:41:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:02,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:02,469 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8638,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:02,669 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 674002882, now seen corresponding path program 680 times [2021-06-05 14:41:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633434542] [2021-06-05 14:41:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:02,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633434542] [2021-06-05 14:41:02,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633434542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988103637] [2021-06-05 14:41:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:02,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:02,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:03,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988103637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:03,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:03,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955542624] [2021-06-05 14:41:03,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:03,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:03,403 INFO L87 Difference]: Start difference. First operand 803 states and 2629 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,011 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-06-05 14:41:04,209 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-06-05 14:41:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:04,450 INFO L93 Difference]: Finished difference Result 1217 states and 3816 transitions. [2021-06-05 14:41:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:04,452 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 14:41:04,452 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 14:41:04,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1061.9ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 14:41:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 810. [2021-06-05 14:41:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.2830655129789865) internal successors, (2656), 809 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2656 transitions. [2021-06-05 14:41:04,462 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2656 transitions. Word has length 22 [2021-06-05 14:41:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:04,462 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2656 transitions. [2021-06-05 14:41:04,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2656 transitions. [2021-06-05 14:41:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:04,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:04,463 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:04,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-05 14:41:04,664 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash -819904840, now seen corresponding path program 681 times [2021-06-05 14:41:04,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:04,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803715259] [2021-06-05 14:41:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:04,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:04,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803715259] [2021-06-05 14:41:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803715259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:04,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460402393] [2021-06-05 14:41:04,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:04,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:05,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460402393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:05,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:05,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866776024] [2021-06-05 14:41:05,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:05,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:05,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:05,398 INFO L87 Difference]: Start difference. First operand 810 states and 2656 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,039 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 14:41:06,288 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 14:41:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:06,564 INFO L93 Difference]: Finished difference Result 1223 states and 3823 transitions. [2021-06-05 14:41:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:06,566 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 14:41:06,566 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 14:41:06,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 14:41:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 807. [2021-06-05 14:41:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.2816377171215882) internal successors, (2645), 806 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2645 transitions. [2021-06-05 14:41:06,580 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2645 transitions. Word has length 22 [2021-06-05 14:41:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:06,580 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2645 transitions. [2021-06-05 14:41:06,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2645 transitions. [2021-06-05 14:41:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:06,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:06,581 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8676 [2021-06-05 14:41:06,789 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -282049262, now seen corresponding path program 682 times [2021-06-05 14:41:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119294204] [2021-06-05 14:41:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:06,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:06,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119294204] [2021-06-05 14:41:06,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119294204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:06,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713414287] [2021-06-05 14:41:06,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:07,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:07,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:07,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:07,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713414287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:07,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:07,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:07,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178395740] [2021-06-05 14:41:07,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:07,555 INFO L87 Difference]: Start difference. First operand 807 states and 2645 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,134 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 14:41:08,375 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-06-05 14:41:08,544 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2021-06-05 14:41:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:08,628 INFO L93 Difference]: Finished difference Result 1187 states and 3741 transitions. [2021-06-05 14:41:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:08,630 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 14:41:08,630 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 14:41:08,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1177.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 14:41:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 804. [2021-06-05 14:41:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.2801992528019923) internal successors, (2634), 803 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 14:41:08,644 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 14:41:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:08,645 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 14:41:08,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 14:41:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:08,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:08,646 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:08,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8698 [2021-06-05 14:41:08,846 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1802387316, now seen corresponding path program 683 times [2021-06-05 14:41:08,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:08,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064431202] [2021-06-05 14:41:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:08,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064431202] [2021-06-05 14:41:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064431202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107914981] [2021-06-05 14:41:08,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:09,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:09,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:09,454 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:41:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:09,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:09,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:09,530 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:09,530 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:09,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:09,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:09,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107914981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:09,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:09,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477242268] [2021-06-05 14:41:09,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:09,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:09,603 INFO L87 Difference]: Start difference. First operand 804 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,170 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-05 14:41:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:10,527 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 14:41:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:10,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:10,529 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 14:41:10,529 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:41:10,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 961.4ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:41:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 812. [2021-06-05 14:41:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.2922318125770653) internal successors, (2670), 811 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2670 transitions. [2021-06-05 14:41:10,540 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2670 transitions. Word has length 22 [2021-06-05 14:41:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:10,540 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2670 transitions. [2021-06-05 14:41:10,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2670 transitions. [2021-06-05 14:41:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:10,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:10,541 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:10,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8717,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:10,741 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash 998672258, now seen corresponding path program 684 times [2021-06-05 14:41:10,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:10,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253374499] [2021-06-05 14:41:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:10,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:10,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253374499] [2021-06-05 14:41:10,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253374499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216870843] [2021-06-05 14:41:10,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:11,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:11,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:11,408 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:11,408 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-06-05 14:41:11,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:11,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:11,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216870843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:11,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:11,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014897530] [2021-06-05 14:41:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:11,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:11,485 INFO L87 Difference]: Start difference. First operand 812 states and 2670 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,055 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 14:41:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:12,422 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 14:41:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:12,423 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 14:41:12,423 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:41:12,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:41:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 809. [2021-06-05 14:41:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.2908415841584158) internal successors, (2659), 808 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2659 transitions. [2021-06-05 14:41:12,435 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2659 transitions. Word has length 22 [2021-06-05 14:41:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:12,435 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2659 transitions. [2021-06-05 14:41:12,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2659 transitions. [2021-06-05 14:41:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:12,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:12,436 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8732 [2021-06-05 14:41:12,636 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1050986878, now seen corresponding path program 685 times [2021-06-05 14:41:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:12,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142102672] [2021-06-05 14:41:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:12,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:12,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142102672] [2021-06-05 14:41:12,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142102672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:12,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012481849] [2021-06-05 14:41:12,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:13,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:13,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,277 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:41:13,277 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:13,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:13,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012481849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18491632] [2021-06-05 14:41:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:13,352 INFO L87 Difference]: Start difference. First operand 809 states and 2659 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:13,930 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-06-05 14:41:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:14,480 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-06-05 14:41:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:14,482 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 14:41:14,482 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:41:14,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:41:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 805. [2021-06-05 14:41:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.2823383084577116) internal successors, (2639), 804 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2639 transitions. [2021-06-05 14:41:14,492 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2639 transitions. Word has length 22 [2021-06-05 14:41:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:14,493 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2639 transitions. [2021-06-05 14:41:14,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2639 transitions. [2021-06-05 14:41:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:14,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:14,494 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:14,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8750,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:14,694 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1030250350, now seen corresponding path program 686 times [2021-06-05 14:41:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:14,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102662829] [2021-06-05 14:41:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:14,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:14,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102662829] [2021-06-05 14:41:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102662829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432296734] [2021-06-05 14:41:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:15,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:15,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:15,287 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:41:15,287 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:15,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:15,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:15,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432296734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:15,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:15,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:15,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193664977] [2021-06-05 14:41:15,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:15,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:15,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:15,358 INFO L87 Difference]: Start difference. First operand 805 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,931 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 14:41:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:16,341 INFO L93 Difference]: Finished difference Result 1252 states and 3909 transitions. [2021-06-05 14:41:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:16,343 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 14:41:16,343 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 14:41:16,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 916.3ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:41:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 14:41:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 804. [2021-06-05 14:41:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.2801992528019923) internal successors, (2634), 803 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 14:41:16,353 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 14:41:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:16,353 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 14:41:16,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 14:41:16,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:16,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:16,354 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:16,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:16,555 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1245859330, now seen corresponding path program 687 times [2021-06-05 14:41:16,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:16,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943495885] [2021-06-05 14:41:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:16,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943495885] [2021-06-05 14:41:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943495885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:16,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641291306] [2021-06-05 14:41:16,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:16,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:17,200 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:41:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:17,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641291306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:17,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:17,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107869045] [2021-06-05 14:41:17,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:17,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:17,363 INFO L87 Difference]: Start difference. First operand 804 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,978 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-06-05 14:41:18,203 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2021-06-05 14:41:18,370 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-06-05 14:41:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:18,461 INFO L93 Difference]: Finished difference Result 1178 states and 3717 transitions. [2021-06-05 14:41:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:18,463 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 14:41:18,463 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 14:41:18,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1190.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 14:41:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 806. [2021-06-05 14:41:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2782608695652176) internal successors, (2639), 805 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 14:41:18,473 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 14:41:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:18,473 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 14:41:18,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 14:41:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:18,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:18,474 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:18,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8788 [2021-06-05 14:41:18,674 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1997259768, now seen corresponding path program 688 times [2021-06-05 14:41:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:18,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771887882] [2021-06-05 14:41:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:18,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:18,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771887882] [2021-06-05 14:41:18,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771887882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:18,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643577095] [2021-06-05 14:41:18,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:18,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:19,316 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:41:19,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:19,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:19,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:19,440 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:41:19,441 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:19,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:19,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:41:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:19,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643577095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:19,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:19,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:19,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350529178] [2021-06-05 14:41:19,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:19,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:19,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:19,485 INFO L87 Difference]: Start difference. First operand 806 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,057 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-06-05 14:41:20,265 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 14:41:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:20,598 INFO L93 Difference]: Finished difference Result 1201 states and 3767 transitions. [2021-06-05 14:41:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:20,599 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 14:41:20,599 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 14:41:20,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1201.1ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 14:41:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 806. [2021-06-05 14:41:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.2782608695652176) internal successors, (2639), 805 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 14:41:20,609 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 14:41:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:20,610 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 14:41:20,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 14:41:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:20,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:20,611 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:20,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8806,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:20,811 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -136058736, now seen corresponding path program 689 times [2021-06-05 14:41:20,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:20,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822575963] [2021-06-05 14:41:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:20,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:20,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822575963] [2021-06-05 14:41:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822575963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:20,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241102647] [2021-06-05 14:41:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:21,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:21,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241102647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:21,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:21,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:21,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708452616] [2021-06-05 14:41:21,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:21,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:21,517 INFO L87 Difference]: Start difference. First operand 806 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,988 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 14:41:22,169 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2021-06-05 14:41:22,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:22,545 INFO L93 Difference]: Finished difference Result 1214 states and 3807 transitions. [2021-06-05 14:41:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:22,547 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 14:41:22,547 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 14:41:22,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 14:41:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 816. [2021-06-05 14:41:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.2846625766871167) internal successors, (2677), 815 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2677 transitions. [2021-06-05 14:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2677 transitions. Word has length 22 [2021-06-05 14:41:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:22,557 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2677 transitions. [2021-06-05 14:41:22,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2677 transitions. [2021-06-05 14:41:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:22,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:22,558 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:22,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8838 [2021-06-05 14:41:22,758 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1629966458, now seen corresponding path program 690 times [2021-06-05 14:41:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:22,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719061466] [2021-06-05 14:41:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:22,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:22,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719061466] [2021-06-05 14:41:22,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719061466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:22,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493082607] [2021-06-05 14:41:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:23,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493082607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:23,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717306995] [2021-06-05 14:41:23,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:23,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:23,458 INFO L87 Difference]: Start difference. First operand 816 states and 2677 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:23,920 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 14:41:24,120 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 14:41:24,279 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 14:41:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:24,492 INFO L93 Difference]: Finished difference Result 1220 states and 3814 transitions. [2021-06-05 14:41:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:24,494 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 14:41:24,494 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 14:41:24,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 14:41:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 813. [2021-06-05 14:41:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.2832512315270934) internal successors, (2666), 812 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2666 transitions. [2021-06-05 14:41:24,504 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2666 transitions. Word has length 22 [2021-06-05 14:41:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:24,505 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2666 transitions. [2021-06-05 14:41:24,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2666 transitions. [2021-06-05 14:41:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:24,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:24,505 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:24,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8853 [2021-06-05 14:41:24,706 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1092110880, now seen corresponding path program 691 times [2021-06-05 14:41:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633247544] [2021-06-05 14:41:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:24,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:24,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633247544] [2021-06-05 14:41:24,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633247544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702372802] [2021-06-05 14:41:24,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:25,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702372802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:25,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:25,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85573360] [2021-06-05 14:41:25,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:25,417 INFO L87 Difference]: Start difference. First operand 813 states and 2666 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:25,894 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 14:41:26,082 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2021-06-05 14:41:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:26,468 INFO L93 Difference]: Finished difference Result 1184 states and 3732 transitions. [2021-06-05 14:41:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:26,470 INFO L225 Difference]: With dead ends: 1184 [2021-06-05 14:41:26,470 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 14:41:26,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 14:41:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 810. [2021-06-05 14:41:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.2818294190358466) internal successors, (2655), 809 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2655 transitions. [2021-06-05 14:41:26,480 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2655 transitions. Word has length 22 [2021-06-05 14:41:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:26,480 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2655 transitions. [2021-06-05 14:41:26,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2655 transitions. [2021-06-05 14:41:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:26,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:26,481 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:26,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8870 [2021-06-05 14:41:26,682 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1598457146, now seen corresponding path program 692 times [2021-06-05 14:41:26,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:26,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453878428] [2021-06-05 14:41:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:26,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:26,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453878428] [2021-06-05 14:41:26,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453878428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:26,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953110005] [2021-06-05 14:41:26,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:26,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:26,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953110005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:27,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784730221] [2021-06-05 14:41:27,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:27,361 INFO L87 Difference]: Start difference. First operand 810 states and 2655 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,829 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 14:41:28,008 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-06-05 14:41:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:28,347 INFO L93 Difference]: Finished difference Result 1181 states and 3721 transitions. [2021-06-05 14:41:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:28,349 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 14:41:28,349 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 14:41:28,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1036.1ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 14:41:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 807. [2021-06-05 14:41:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.2803970223325063) internal successors, (2644), 806 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2644 transitions. [2021-06-05 14:41:28,359 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2644 transitions. Word has length 22 [2021-06-05 14:41:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:28,359 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2644 transitions. [2021-06-05 14:41:28,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2644 transitions. [2021-06-05 14:41:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:28,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:28,360 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:28,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8893,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:28,560 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 405256454, now seen corresponding path program 693 times [2021-06-05 14:41:28,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:28,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185850269] [2021-06-05 14:41:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:28,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:28,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185850269] [2021-06-05 14:41:28,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185850269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802426562] [2021-06-05 14:41:28,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:28,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:29,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802426562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:29,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:29,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:29,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562403558] [2021-06-05 14:41:29,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:29,337 INFO L87 Difference]: Start difference. First operand 807 states and 2644 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,781 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-05 14:41:29,979 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 14:41:30,222 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2021-06-05 14:41:30,378 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:41:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:30,501 INFO L93 Difference]: Finished difference Result 1223 states and 3829 transitions. [2021-06-05 14:41:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:30,503 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 14:41:30,503 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 14:41:30,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1257.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 14:41:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 814. [2021-06-05 14:41:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.2853628536285364) internal successors, (2671), 813 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2671 transitions. [2021-06-05 14:41:30,513 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2671 transitions. Word has length 22 [2021-06-05 14:41:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:30,513 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2671 transitions. [2021-06-05 14:41:30,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2671 transitions. [2021-06-05 14:41:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:30,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:30,514 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:30,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8911,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,714 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1088651268, now seen corresponding path program 694 times [2021-06-05 14:41:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:30,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545481339] [2021-06-05 14:41:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:30,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545481339] [2021-06-05 14:41:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545481339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792096534] [2021-06-05 14:41:30,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:31,281 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:41:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:31,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792096534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:31,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:31,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715692057] [2021-06-05 14:41:31,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:31,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:31,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:31,532 INFO L87 Difference]: Start difference. First operand 814 states and 2671 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,976 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 14:41:32,178 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-05 14:41:32,359 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-06-05 14:41:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:32,581 INFO L93 Difference]: Finished difference Result 1229 states and 3836 transitions. [2021-06-05 14:41:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:32,583 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 14:41:32,583 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 14:41:32,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 14:41:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-06-05 14:41:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.2839506172839505) internal successors, (2660), 810 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2660 transitions. [2021-06-05 14:41:32,593 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2660 transitions. Word has length 22 [2021-06-05 14:41:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:32,593 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2660 transitions. [2021-06-05 14:41:32,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2660 transitions. [2021-06-05 14:41:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:32,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:32,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:32,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8928 [2021-06-05 14:41:32,794 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash -550795690, now seen corresponding path program 695 times [2021-06-05 14:41:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:32,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218427235] [2021-06-05 14:41:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218427235] [2021-06-05 14:41:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218427235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157612931] [2021-06-05 14:41:32,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:33,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:33,383 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:41:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:33,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157612931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:33,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:33,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:33,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402718319] [2021-06-05 14:41:33,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:33,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:33,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:33,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:33,633 INFO L87 Difference]: Start difference. First operand 811 states and 2660 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,094 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 14:41:34,300 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 14:41:34,494 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-06-05 14:41:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:34,735 INFO L93 Difference]: Finished difference Result 1193 states and 3754 transitions. [2021-06-05 14:41:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:34,737 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 14:41:34,737 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 14:41:34,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1265.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 14:41:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 808. [2021-06-05 14:41:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.282527881040892) internal successors, (2649), 807 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2649 transitions. [2021-06-05 14:41:34,747 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2649 transitions. Word has length 22 [2021-06-05 14:41:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:34,747 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2649 transitions. [2021-06-05 14:41:34,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2649 transitions. [2021-06-05 14:41:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:34,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:34,748 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:34,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8949,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:34,948 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2071133744, now seen corresponding path program 696 times [2021-06-05 14:41:34,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:34,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552719632] [2021-06-05 14:41:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:35,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552719632] [2021-06-05 14:41:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552719632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933856859] [2021-06-05 14:41:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:35,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:35,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:35,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:35,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,616 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:35,616 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:35,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:35,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933856859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:35,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:35,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:35,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638093235] [2021-06-05 14:41:35,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:35,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:35,692 INFO L87 Difference]: Start difference. First operand 808 states and 2649 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,119 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-05 14:41:36,310 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 14:41:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:36,660 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 14:41:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:36,661 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 14:41:36,661 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:41:36,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:41:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 816. [2021-06-05 14:41:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.294478527607362) internal successors, (2685), 815 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2685 transitions. [2021-06-05 14:41:36,673 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2685 transitions. Word has length 22 [2021-06-05 14:41:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:36,673 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2685 transitions. [2021-06-05 14:41:36,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2685 transitions. [2021-06-05 14:41:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:36,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:36,674 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:36,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8967,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:36,874 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash 729925830, now seen corresponding path program 697 times [2021-06-05 14:41:36,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:36,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287714213] [2021-06-05 14:41:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:37,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287714213] [2021-06-05 14:41:37,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287714213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782977420] [2021-06-05 14:41:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:37,464 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:41:37,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:37,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:37,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:37,620 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:37,620 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:37,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:37,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782977420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:37,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:37,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746372831] [2021-06-05 14:41:37,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:37,696 INFO L87 Difference]: Start difference. First operand 816 states and 2685 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,105 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 14:41:38,298 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 14:41:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:38,643 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 14:41:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:38,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:38,644 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 14:41:38,644 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:41:38,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:41:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 813. [2021-06-05 14:41:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.293103448275862) internal successors, (2674), 812 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 14:41:38,655 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 14:41:38,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:38,656 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 14:41:38,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 14:41:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:38,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:38,657 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:38,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 722 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8983 [2021-06-05 14:41:38,857 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1319733306, now seen corresponding path program 698 times [2021-06-05 14:41:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:38,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975712714] [2021-06-05 14:41:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:38,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:38,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975712714] [2021-06-05 14:41:38,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975712714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:38,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284313015] [2021-06-05 14:41:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:39,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:39,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:39,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:39,526 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:39,526 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:39,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:39,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:39,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284313015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:39,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:39,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:39,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681108938] [2021-06-05 14:41:39,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:39,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:39,607 INFO L87 Difference]: Start difference. First operand 813 states and 2674 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,047 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-06-05 14:41:40,239 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 14:41:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:40,777 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-06-05 14:41:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:40,779 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 14:41:40,779 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:41:40,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1179.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:41:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 809. [2021-06-05 14:41:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.2846534653465347) internal successors, (2654), 808 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2654 transitions. [2021-06-05 14:41:40,789 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2654 transitions. Word has length 22 [2021-06-05 14:41:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:40,789 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2654 transitions. [2021-06-05 14:41:40,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2654 transitions. [2021-06-05 14:41:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:40,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:40,790 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:40,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9007 [2021-06-05 14:41:40,991 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:40,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1298996778, now seen corresponding path program 699 times [2021-06-05 14:41:40,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:40,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798984840] [2021-06-05 14:41:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:41,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798984840] [2021-06-05 14:41:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798984840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354584385] [2021-06-05 14:41:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:41:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:41,808 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_613, v_prenex_603, v_prenex_604, v_prenex_605, v_prenex_609, v_prenex_612], 1=[v_prenex_608, nondet_0, v_prenex_611]} [2021-06-05 14:41:41,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:41:41,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:41,940 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 14:41:41,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:41,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:41:41,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,070 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 14:41:42,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:41:42,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,198 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 14:41:42,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:41:42,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,324 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 14:41:42,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:41:42,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,449 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 14:41:42,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:41:42,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,578 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 14:41:42,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 14:41:42,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,701 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 14:41:42,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 14:41:42,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,820 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 14:41:42,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,829 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 14:41:42,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 14:41:42,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,934 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 14:41:42,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 9 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:41:42,938 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:157 [2021-06-05 14:41:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354584385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:43,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:41:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835968490] [2021-06-05 14:41:43,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:41:43,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:41:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:43,136 INFO L87 Difference]: Start difference. First operand 809 states and 2654 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,670 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 14:41:43,860 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 14:41:44,060 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-06-05 14:41:44,259 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-06-05 14:41:44,495 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-05 14:41:44,722 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2021-06-05 14:41:45,034 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-06-05 14:41:45,319 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 14:41:45,622 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-06-05 14:41:45,850 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 108 [2021-06-05 14:41:46,244 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-06-05 14:41:46,452 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-06-05 14:41:46,662 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-06-05 14:41:46,979 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2021-06-05 14:41:47,167 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-06-05 14:41:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:47,360 INFO L93 Difference]: Finished difference Result 1681 states and 5049 transitions. [2021-06-05 14:41:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:41:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:47,362 INFO L225 Difference]: With dead ends: 1681 [2021-06-05 14:41:47,362 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 14:41:47,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4202.1ms TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:41:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 14:41:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 835. [2021-06-05 14:41:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.305755395683453) internal successors, (2757), 834 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-06-05 14:41:47,374 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-06-05 14:41:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:47,375 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-06-05 14:41:47,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-06-05 14:41:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:47,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:47,376 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:47,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9022 [2021-06-05 14:41:47,576 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1080546592, now seen corresponding path program 700 times [2021-06-05 14:41:47,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:47,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500121863] [2021-06-05 14:41:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:47,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500121863] [2021-06-05 14:41:47,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500121863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:47,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996524466] [2021-06-05 14:41:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:47,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:47,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:48,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:48,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:48,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:48,241 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:41:48,241 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:48,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:48,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:41:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:48,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996524466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:48,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:48,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:48,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957058653] [2021-06-05 14:41:48,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:48,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:48,317 INFO L87 Difference]: Start difference. First operand 835 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,748 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 14:41:48,942 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 14:41:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:49,262 INFO L93 Difference]: Finished difference Result 1278 states and 4004 transitions. [2021-06-05 14:41:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:49,264 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:41:49,264 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 14:41:49,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 14:41:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 833. [2021-06-05 14:41:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 14:41:49,276 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 14:41:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:49,276 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 14:41:49,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 14:41:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:49,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:49,277 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:49,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9043,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:49,477 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash 977112902, now seen corresponding path program 701 times [2021-06-05 14:41:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083685470] [2021-06-05 14:41:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083685470] [2021-06-05 14:41:49,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083685470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67500086] [2021-06-05 14:41:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:49,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:50,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67500086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:50,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:50,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:41:50,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566794273] [2021-06-05 14:41:50,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:41:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:41:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:50,310 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,737 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 14:41:50,942 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2021-06-05 14:41:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:51,442 INFO L93 Difference]: Finished difference Result 1233 states and 3881 transitions. [2021-06-05 14:41:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:51,443 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:41:51,444 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 14:41:51,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1347.4ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 14:41:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 835. [2021-06-05 14:41:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.305755395683453) internal successors, (2757), 834 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-06-05 14:41:51,454 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-06-05 14:41:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:51,454 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-06-05 14:41:51,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-06-05 14:41:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:51,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:51,455 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:51,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9060,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:51,655 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1728513340, now seen corresponding path program 702 times [2021-06-05 14:41:51,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:51,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754278381] [2021-06-05 14:41:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:51,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754278381] [2021-06-05 14:41:51,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754278381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232346553] [2021-06-05 14:41:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:51,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:52,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:52,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:52,453 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:41:52,453 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:41:52,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:52,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:41:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:52,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232346553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:52,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327426616] [2021-06-05 14:41:52,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:52,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:52,500 INFO L87 Difference]: Start difference. First operand 835 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,932 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-05 14:41:53,131 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 14:41:53,390 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2021-06-05 14:41:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:53,611 INFO L93 Difference]: Finished difference Result 1214 states and 3839 transitions. [2021-06-05 14:41:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:53,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:53,613 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 14:41:53,613 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:41:53,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1246.3ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:41:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:41:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 833. [2021-06-05 14:41:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 14:41:53,623 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 14:41:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:53,624 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 14:41:53,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 14:41:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:53,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:53,625 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:53,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9075,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:53,825 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1477931050, now seen corresponding path program 703 times [2021-06-05 14:41:53,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:53,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636362637] [2021-06-05 14:41:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:53,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636362637] [2021-06-05 14:41:53,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636362637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886300956] [2021-06-05 14:41:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:54,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886300956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:54,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:54,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094081585] [2021-06-05 14:41:54,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:54,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:54,502 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,953 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-06-05 14:41:55,227 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 14:41:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:55,555 INFO L93 Difference]: Finished difference Result 1201 states and 3804 transitions. [2021-06-05 14:41:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:55,557 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 14:41:55,557 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 14:41:55,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1125.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 14:41:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-06-05 14:41:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3052884615384617) internal successors, (2750), 832 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2750 transitions. [2021-06-05 14:41:55,567 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2750 transitions. Word has length 22 [2021-06-05 14:41:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:55,568 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2750 transitions. [2021-06-05 14:41:55,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2750 transitions. [2021-06-05 14:41:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:55,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:55,569 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:55,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9101 [2021-06-05 14:41:55,769 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 340646048, now seen corresponding path program 704 times [2021-06-05 14:41:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897331656] [2021-06-05 14:41:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897331656] [2021-06-05 14:41:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897331656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825396656] [2021-06-05 14:41:55,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:56,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:56,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:41:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825396656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:41:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58024222] [2021-06-05 14:41:56,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:56,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:56,491 INFO L87 Difference]: Start difference. First operand 833 states and 2750 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,945 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 14:41:57,149 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-06-05 14:41:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:57,465 INFO L93 Difference]: Finished difference Result 1195 states and 3789 transitions. [2021-06-05 14:41:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:41:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:57,467 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 14:41:57,467 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 14:41:57,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1071.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 14:41:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-06-05 14:41:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3028846153846154) internal successors, (2748), 832 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2748 transitions. [2021-06-05 14:41:57,477 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2748 transitions. Word has length 22 [2021-06-05 14:41:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:57,477 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2748 transitions. [2021-06-05 14:41:57,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2748 transitions. [2021-06-05 14:41:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:41:57,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:57,478 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:57,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9114 [2021-06-05 14:41:57,678 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1092046486, now seen corresponding path program 705 times [2021-06-05 14:41:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:57,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107372743] [2021-06-05 14:41:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:57,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107372743] [2021-06-05 14:41:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107372743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484567667] [2021-06-05 14:41:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:57,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:41:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:58,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:41:58,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 14:41:58,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:58,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:58,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 14:41:58,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:41:58,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:58,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:41:58,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 14:41:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 14:41:58,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:58,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:58,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:41:58,662 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:207, output treesize:84 [2021-06-05 14:41:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484567667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:58,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:41:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044620105] [2021-06-05 14:41:58,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:41:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:41:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:58,785 INFO L87 Difference]: Start difference. First operand 833 states and 2748 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:59,250 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 14:41:59,437 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 14:42:00,097 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 14:42:00,237 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 14:42:00,438 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 14:42:00,588 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 14:42:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:00,615 INFO L93 Difference]: Finished difference Result 1371 states and 4260 transitions. [2021-06-05 14:42:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:00,617 INFO L225 Difference]: With dead ends: 1371 [2021-06-05 14:42:00,617 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 14:42:00,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1996.9ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:42:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 14:42:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 833. [2021-06-05 14:42:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.300480769230769) internal successors, (2746), 832 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2746 transitions. [2021-06-05 14:42:00,628 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2746 transitions. Word has length 22 [2021-06-05 14:42:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:00,628 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2746 transitions. [2021-06-05 14:42:00,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2746 transitions. [2021-06-05 14:42:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:00,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:00,629 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:00,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9128 [2021-06-05 14:42:00,829 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash -823377440, now seen corresponding path program 706 times [2021-06-05 14:42:00,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217576975] [2021-06-05 14:42:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:00,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:00,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217576975] [2021-06-05 14:42:00,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217576975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:00,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652353524] [2021-06-05 14:42:00,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:01,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:01,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:01,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:01,531 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:42:01,532 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:01,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:01,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:42:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652353524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:01,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:01,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084699313] [2021-06-05 14:42:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:01,577 INFO L87 Difference]: Start difference. First operand 833 states and 2746 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,006 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 14:42:02,254 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 14:42:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:02,522 INFO L93 Difference]: Finished difference Result 1189 states and 3780 transitions. [2021-06-05 14:42:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:02,524 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 14:42:02,524 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 14:42:02,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 14:42:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 829. [2021-06-05 14:42:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.3043478260869565) internal successors, (2736), 828 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2736 transitions. [2021-06-05 14:42:02,534 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2736 transitions. Word has length 22 [2021-06-05 14:42:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:02,534 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2736 transitions. [2021-06-05 14:42:02,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2736 transitions. [2021-06-05 14:42:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:02,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:02,535 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:02,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9169 [2021-06-05 14:42:02,735 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash -757398910, now seen corresponding path program 707 times [2021-06-05 14:42:02,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:02,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644303487] [2021-06-05 14:42:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644303487] [2021-06-05 14:42:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644303487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339508431] [2021-06-05 14:42:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:03,209 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 14:42:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339508431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:03,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:03,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945984154] [2021-06-05 14:42:03,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:03,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:03,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:03,459 INFO L87 Difference]: Start difference. First operand 829 states and 2736 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,760 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 14:42:03,929 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-06-05 14:42:04,105 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2021-06-05 14:42:04,281 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-06-05 14:42:04,434 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2021-06-05 14:42:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:04,607 INFO L93 Difference]: Finished difference Result 1414 states and 4401 transitions. [2021-06-05 14:42:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:04,609 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 14:42:04,609 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 14:42:04,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 14:42:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 842. [2021-06-05 14:42:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.3115338882282996) internal successors, (2785), 841 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2785 transitions. [2021-06-05 14:42:04,620 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2785 transitions. Word has length 22 [2021-06-05 14:42:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:04,620 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2785 transitions. [2021-06-05 14:42:04,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2785 transitions. [2021-06-05 14:42:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:04,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:04,621 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:04,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9194,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:04,822 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:04,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:04,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2043660664, now seen corresponding path program 708 times [2021-06-05 14:42:04,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:04,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471811106] [2021-06-05 14:42:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:04,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471811106] [2021-06-05 14:42:04,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471811106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894817409] [2021-06-05 14:42:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:05,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:05,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894817409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:05,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598073895] [2021-06-05 14:42:05,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:05,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:05,515 INFO L87 Difference]: Start difference. First operand 842 states and 2785 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,846 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-06-05 14:42:06,017 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2021-06-05 14:42:06,191 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2021-06-05 14:42:06,416 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-05 14:42:06,572 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-06-05 14:42:06,740 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 14:42:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:06,774 INFO L93 Difference]: Finished difference Result 1420 states and 4408 transitions. [2021-06-05 14:42:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:06,776 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 14:42:06,776 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 14:42:06,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1314.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 14:42:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 839. [2021-06-05 14:42:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.3102625298329356) internal successors, (2774), 838 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2774 transitions. [2021-06-05 14:42:06,788 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2774 transitions. Word has length 22 [2021-06-05 14:42:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:06,788 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2774 transitions. [2021-06-05 14:42:06,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2774 transitions. [2021-06-05 14:42:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:06,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:06,789 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:06,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9210 [2021-06-05 14:42:06,990 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:06,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1713451054, now seen corresponding path program 709 times [2021-06-05 14:42:06,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:06,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274566289] [2021-06-05 14:42:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:07,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274566289] [2021-06-05 14:42:07,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274566289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214768117] [2021-06-05 14:42:07,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214768117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:07,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:07,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991403638] [2021-06-05 14:42:07,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:07,701 INFO L87 Difference]: Start difference. First operand 839 states and 2774 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,006 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 14:42:08,178 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-06-05 14:42:08,358 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2021-06-05 14:42:08,532 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2021-06-05 14:42:08,836 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2021-06-05 14:42:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:08,856 INFO L93 Difference]: Finished difference Result 1384 states and 4326 transitions. [2021-06-05 14:42:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:08,858 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 14:42:08,858 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 14:42:08,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1274.7ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 14:42:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 836. [2021-06-05 14:42:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.308982035928144) internal successors, (2763), 835 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2763 transitions. [2021-06-05 14:42:08,869 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2763 transitions. Word has length 22 [2021-06-05 14:42:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:08,869 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2763 transitions. [2021-06-05 14:42:08,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2763 transitions. [2021-06-05 14:42:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:08,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:08,870 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:09,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9228,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:09,070 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2075169976, now seen corresponding path program 710 times [2021-06-05 14:42:09,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:09,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071528349] [2021-06-05 14:42:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:09,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071528349] [2021-06-05 14:42:09,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071528349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887362347] [2021-06-05 14:42:09,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:09,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:09,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:09,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887362347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:09,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:09,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:09,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834983689] [2021-06-05 14:42:09,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:09,688 INFO L87 Difference]: Start difference. First operand 836 states and 2763 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,991 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 14:42:10,160 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-06-05 14:42:10,347 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-06-05 14:42:10,764 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-06-05 14:42:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:10,782 INFO L93 Difference]: Finished difference Result 1381 states and 4315 transitions. [2021-06-05 14:42:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:10,784 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 14:42:10,784 INFO L226 Difference]: Without dead ends: 1363 [2021-06-05 14:42:10,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1139.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-05 14:42:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 833. [2021-06-05 14:42:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3076923076923075) internal successors, (2752), 832 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 14:42:10,796 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 14:42:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:10,796 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 14:42:10,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 14:42:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:10,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:10,797 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:10,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9240,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,997 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1179561522, now seen corresponding path program 711 times [2021-06-05 14:42:10,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:10,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635123567] [2021-06-05 14:42:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635123567] [2021-06-05 14:42:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635123567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246735461] [2021-06-05 14:42:11,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:11,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246735461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:11,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26631907] [2021-06-05 14:42:11,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:11,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:11,589 INFO L87 Difference]: Start difference. First operand 833 states and 2752 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:11,887 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 14:42:12,046 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 14:42:12,344 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2021-06-05 14:42:12,472 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2021-06-05 14:42:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,615 INFO L93 Difference]: Finished difference Result 1419 states and 4388 transitions. [2021-06-05 14:42:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,617 INFO L225 Difference]: With dead ends: 1419 [2021-06-05 14:42:12,617 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 14:42:12,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1075.8ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 14:42:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 830. [2021-06-05 14:42:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.3063932448733415) internal successors, (2741), 829 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2741 transitions. [2021-06-05 14:42:12,629 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2741 transitions. Word has length 22 [2021-06-05 14:42:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,629 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2741 transitions. [2021-06-05 14:42:12,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2741 transitions. [2021-06-05 14:42:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:12,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,630 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:12,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9257 [2021-06-05 14:42:12,831 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 381531912, now seen corresponding path program 712 times [2021-06-05 14:42:12,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:12,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037242057] [2021-06-05 14:42:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037242057] [2021-06-05 14:42:12,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037242057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36964420] [2021-06-05 14:42:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:13,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:13,346 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 14:42:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:13,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36964420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:13,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:13,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681569206] [2021-06-05 14:42:13,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:13,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:13,644 INFO L87 Difference]: Start difference. First operand 830 states and 2741 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,953 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 14:42:14,149 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:42:14,326 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2021-06-05 14:42:14,496 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 14:42:14,662 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-05 14:42:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:14,826 INFO L93 Difference]: Finished difference Result 1341 states and 4208 transitions. [2021-06-05 14:42:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:14,828 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 14:42:14,828 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:42:14,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1337.7ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:42:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 840. [2021-06-05 14:42:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.3122765196662693) internal successors, (2779), 839 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2779 transitions. [2021-06-05 14:42:14,839 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2779 transitions. Word has length 22 [2021-06-05 14:42:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:14,839 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2779 transitions. [2021-06-05 14:42:14,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2779 transitions. [2021-06-05 14:42:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:14,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:14,840 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:15,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9278,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,041 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1112375810, now seen corresponding path program 713 times [2021-06-05 14:42:15,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:15,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007734232] [2021-06-05 14:42:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007734232] [2021-06-05 14:42:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007734232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175439327] [2021-06-05 14:42:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:15,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:15,524 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 14:42:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175439327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:15,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922749569] [2021-06-05 14:42:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:15,813 INFO L87 Difference]: Start difference. First operand 840 states and 2779 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,140 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 14:42:16,336 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 14:42:16,521 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-06-05 14:42:16,690 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 14:42:16,852 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 14:42:17,080 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 14:42:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:17,108 INFO L93 Difference]: Finished difference Result 1347 states and 4215 transitions. [2021-06-05 14:42:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:17,110 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 14:42:17,110 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:42:17,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1418.6ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:42:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 837. [2021-06-05 14:42:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.311004784688995) internal successors, (2768), 836 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2768 transitions. [2021-06-05 14:42:17,121 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2768 transitions. Word has length 22 [2021-06-05 14:42:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:17,121 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2768 transitions. [2021-06-05 14:42:17,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2768 transitions. [2021-06-05 14:42:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:17,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:17,122 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:17,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9298 [2021-06-05 14:42:17,322 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash -574520232, now seen corresponding path program 714 times [2021-06-05 14:42:17,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:17,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419448986] [2021-06-05 14:42:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:17,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:17,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419448986] [2021-06-05 14:42:17,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419448986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:17,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156640119] [2021-06-05 14:42:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:17,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156640119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:18,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:18,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106672] [2021-06-05 14:42:18,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:18,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:18,085 INFO L87 Difference]: Start difference. First operand 837 states and 2768 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,413 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:42:18,619 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 14:42:18,858 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-06-05 14:42:19,043 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-06-05 14:42:19,353 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:42:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:19,367 INFO L93 Difference]: Finished difference Result 1311 states and 4133 transitions. [2021-06-05 14:42:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:19,369 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 14:42:19,369 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 14:42:19,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1386.5ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 14:42:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 834. [2021-06-05 14:42:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.3097238895558223) internal successors, (2757), 833 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2757 transitions. [2021-06-05 14:42:19,379 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2757 transitions. Word has length 22 [2021-06-05 14:42:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:19,379 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2757 transitions. [2021-06-05 14:42:19,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2757 transitions. [2021-06-05 14:42:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:19,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:19,380 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:19,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9319,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:19,581 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1080866498, now seen corresponding path program 715 times [2021-06-05 14:42:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:19,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475716095] [2021-06-05 14:42:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:19,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475716095] [2021-06-05 14:42:19,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475716095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804792077] [2021-06-05 14:42:19,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804792077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:20,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408375211] [2021-06-05 14:42:20,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:20,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:20,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:20,297 INFO L87 Difference]: Start difference. First operand 834 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,614 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 14:42:20,810 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 14:42:20,999 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2021-06-05 14:42:21,299 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 14:42:21,451 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 14:42:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:21,464 INFO L93 Difference]: Finished difference Result 1308 states and 4122 transitions. [2021-06-05 14:42:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:21,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:21,466 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 14:42:21,466 INFO L226 Difference]: Without dead ends: 1290 [2021-06-05 14:42:21,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-06-05 14:42:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 831. [2021-06-05 14:42:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.3084337349397592) internal successors, (2746), 830 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2746 transitions. [2021-06-05 14:42:21,477 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2746 transitions. Word has length 22 [2021-06-05 14:42:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:21,477 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2746 transitions. [2021-06-05 14:42:21,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2746 transitions. [2021-06-05 14:42:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:21,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:21,478 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:21,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9344 [2021-06-05 14:42:21,679 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash 922847102, now seen corresponding path program 716 times [2021-06-05 14:42:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:21,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251478875] [2021-06-05 14:42:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:21,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:21,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251478875] [2021-06-05 14:42:21,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251478875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:21,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104735868] [2021-06-05 14:42:21,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:21,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104735868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:22,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:22,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852353274] [2021-06-05 14:42:22,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:22,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:22,470 INFO L87 Difference]: Start difference. First operand 831 states and 2746 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,768 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 14:42:22,963 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 14:42:23,172 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-06-05 14:42:23,351 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-06-05 14:42:23,523 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:42:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:23,685 INFO L93 Difference]: Finished difference Result 1341 states and 4205 transitions. [2021-06-05 14:42:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:23,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:23,687 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 14:42:23,687 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:42:23,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1333.3ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:42:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 838. [2021-06-05 14:42:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.3130227001194745) internal successors, (2773), 837 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2773 transitions. [2021-06-05 14:42:23,698 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2773 transitions. Word has length 22 [2021-06-05 14:42:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:23,698 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2773 transitions. [2021-06-05 14:42:23,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2773 transitions. [2021-06-05 14:42:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:23,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:23,699 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:23,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9364,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,899 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash -571060620, now seen corresponding path program 717 times [2021-06-05 14:42:23,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:23,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142098993] [2021-06-05 14:42:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:24,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142098993] [2021-06-05 14:42:24,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142098993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921814793] [2021-06-05 14:42:24,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:24,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921814793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:24,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:24,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443282452] [2021-06-05 14:42:24,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:24,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:24,679 INFO L87 Difference]: Start difference. First operand 838 states and 2773 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,985 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-06-05 14:42:25,182 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-06-05 14:42:25,391 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 14:42:25,565 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 14:42:25,738 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-05 14:42:25,918 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-06-05 14:42:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:25,947 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-06-05 14:42:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:25,949 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 14:42:25,949 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:42:25,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1384.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:42:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 835. [2021-06-05 14:42:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3117505995203835) internal successors, (2762), 834 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2762 transitions. [2021-06-05 14:42:25,960 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2762 transitions. Word has length 22 [2021-06-05 14:42:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:25,960 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2762 transitions. [2021-06-05 14:42:25,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2762 transitions. [2021-06-05 14:42:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:25,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:25,961 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:26,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9377 [2021-06-05 14:42:26,162 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash -33205042, now seen corresponding path program 718 times [2021-06-05 14:42:26,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:26,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363705267] [2021-06-05 14:42:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:26,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363705267] [2021-06-05 14:42:26,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363705267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658850143] [2021-06-05 14:42:26,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:26,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:26,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:26,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:26,671 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 14:42:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658850143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:26,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890557063] [2021-06-05 14:42:26,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:26,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:26,994 INFO L87 Difference]: Start difference. First operand 835 states and 2762 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 14:42:27,635 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 14:42:27,849 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-06-05 14:42:28,035 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2021-06-05 14:42:28,192 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2021-06-05 14:42:28,359 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 14:42:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:28,372 INFO L93 Difference]: Finished difference Result 1311 states and 4130 transitions. [2021-06-05 14:42:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:28,374 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 14:42:28,374 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 14:42:28,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1521.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 14:42:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 832. [2021-06-05 14:42:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.3104693140794224) internal successors, (2751), 831 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-06-05 14:42:28,385 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-06-05 14:42:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:28,385 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-06-05 14:42:28,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-06-05 14:42:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:28,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:28,386 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:28,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9394,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,587 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1553543096, now seen corresponding path program 719 times [2021-06-05 14:42:28,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:28,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586060140] [2021-06-05 14:42:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:28,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586060140] [2021-06-05 14:42:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586060140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048608429] [2021-06-05 14:42:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:29,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:29,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:29,283 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:42:29,283 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:29,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:29,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:42:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:29,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048608429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:29,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:29,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637500470] [2021-06-05 14:42:29,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:29,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:29,357 INFO L87 Difference]: Start difference. First operand 832 states and 2751 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,673 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 14:42:29,875 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-06-05 14:42:30,081 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-06-05 14:42:30,270 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-06-05 14:42:30,439 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 14:42:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:30,625 INFO L93 Difference]: Finished difference Result 1416 states and 4390 transitions. [2021-06-05 14:42:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:30,627 INFO L225 Difference]: With dead ends: 1416 [2021-06-05 14:42:30,627 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 14:42:30,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1320.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 14:42:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 840. [2021-06-05 14:42:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.3218116805721096) internal successors, (2787), 839 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2787 transitions. [2021-06-05 14:42:30,638 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2787 transitions. Word has length 22 [2021-06-05 14:42:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:30,638 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2787 transitions. [2021-06-05 14:42:30,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2787 transitions. [2021-06-05 14:42:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:30,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:30,639 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:30,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9412 [2021-06-05 14:42:30,840 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1247516478, now seen corresponding path program 720 times [2021-06-05 14:42:30,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:30,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937684039] [2021-06-05 14:42:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937684039] [2021-06-05 14:42:30,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937684039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146490415] [2021-06-05 14:42:30,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:31,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:31,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:31,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:31,525 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:42:31,525 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:31,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:31,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:42:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146490415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:31,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:31,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:31,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211049795] [2021-06-05 14:42:31,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:31,597 INFO L87 Difference]: Start difference. First operand 840 states and 2787 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,969 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-05 14:42:32,170 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-06-05 14:42:32,376 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 14:42:32,564 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 14:42:32,737 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-06-05 14:42:32,924 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-05 14:42:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:32,965 INFO L93 Difference]: Finished difference Result 1422 states and 4391 transitions. [2021-06-05 14:42:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:32,968 INFO L225 Difference]: With dead ends: 1422 [2021-06-05 14:42:32,968 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 14:42:32,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1424.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 14:42:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 837. [2021-06-05 14:42:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3205741626794256) internal successors, (2776), 836 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2776 transitions. [2021-06-05 14:42:32,979 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2776 transitions. Word has length 22 [2021-06-05 14:42:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:32,979 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2776 transitions. [2021-06-05 14:42:32,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2776 transitions. [2021-06-05 14:42:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:32,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:32,980 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:33,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9429,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:33,181 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash -802142658, now seen corresponding path program 721 times [2021-06-05 14:42:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11954351] [2021-06-05 14:42:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:33,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11954351] [2021-06-05 14:42:33,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11954351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535297619] [2021-06-05 14:42:33,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:33,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:33,894 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:42:33,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-06-05 14:42:33,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:33,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:42:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535297619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:33,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961950467] [2021-06-05 14:42:33,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:33,980 INFO L87 Difference]: Start difference. First operand 837 states and 2776 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,272 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 14:42:34,462 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:42:34,668 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-06-05 14:42:34,854 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 14:42:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:35,416 INFO L93 Difference]: Finished difference Result 1411 states and 4375 transitions. [2021-06-05 14:42:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:35,418 INFO L225 Difference]: With dead ends: 1411 [2021-06-05 14:42:35,419 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 14:42:35,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1519.8ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:42:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 14:42:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 833. [2021-06-05 14:42:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 14:42:35,430 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 14:42:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 14:42:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 14:42:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:35,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:35,431 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:35,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9447 [2021-06-05 14:42:35,631 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash -781406130, now seen corresponding path program 722 times [2021-06-05 14:42:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:35,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936130763] [2021-06-05 14:42:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936130763] [2021-06-05 14:42:35,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936130763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185465274] [2021-06-05 14:42:35,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:35,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:35,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:36,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:36,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:36,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,309 INFO L628 ElimStorePlain]: treesize reduction 166, result has 14.0 percent of original size [2021-06-05 14:42:36,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_772 vanished before elimination [2021-06-05 14:42:36,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_773 vanished before elimination [2021-06-05 14:42:36,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-06-05 14:42:36,309 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:36,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:36,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:220, output treesize:27 [2021-06-05 14:42:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185465274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:36,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088803718] [2021-06-05 14:42:36,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:36,388 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,689 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 14:42:36,896 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 14:42:37,102 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 14:42:37,297 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-05 14:42:37,492 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-06-05 14:42:37,676 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 14:42:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:37,786 INFO L93 Difference]: Finished difference Result 1367 states and 4273 transitions. [2021-06-05 14:42:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:37,788 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:42:37,788 INFO L226 Difference]: Without dead ends: 1361 [2021-06-05 14:42:37,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1448.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-06-05 14:42:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 833. [2021-06-05 14:42:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 14:42:37,799 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 14:42:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:37,799 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 14:42:37,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 14:42:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:37,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:37,800 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:38,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9463,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,001 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1494703550, now seen corresponding path program 723 times [2021-06-05 14:42:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895923961] [2021-06-05 14:42:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:38,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895923961] [2021-06-05 14:42:38,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895923961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783380500] [2021-06-05 14:42:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783380500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:38,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:38,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146629845] [2021-06-05 14:42:38,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:38,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:38,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:38,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:38,799 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,111 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-06-05 14:42:39,310 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:42:39,534 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-05 14:42:39,799 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-06-05 14:42:40,109 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-06-05 14:42:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:40,124 INFO L93 Difference]: Finished difference Result 1305 states and 4119 transitions. [2021-06-05 14:42:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:40,126 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 14:42:40,126 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 14:42:40,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1463.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 14:42:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 835. [2021-06-05 14:42:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 14:42:40,137 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 14:42:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:40,137 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 14:42:40,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 14:42:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:40,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:40,138 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:40,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9482 [2021-06-05 14:42:40,338 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2048863308, now seen corresponding path program 724 times [2021-06-05 14:42:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:40,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554709876] [2021-06-05 14:42:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:40,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554709876] [2021-06-05 14:42:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554709876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507058710] [2021-06-05 14:42:40,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:40,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:41,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,102 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:42:41,102 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:41,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:41,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:42:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507058710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:41,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360293656] [2021-06-05 14:42:41,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:41,146 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,447 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:42:41,645 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 14:42:41,860 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-06-05 14:42:42,065 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-05 14:42:42,239 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 14:42:42,421 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 14:42:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:42,523 INFO L93 Difference]: Finished difference Result 1307 states and 4126 transitions. [2021-06-05 14:42:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:42,525 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 14:42:42,525 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:42:42,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:42:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 833. [2021-06-05 14:42:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 14:42:42,536 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 14:42:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:42,536 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 14:42:42,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 14:42:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:42,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:42,537 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:42,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 749 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9499 [2021-06-05 14:42:42,737 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:42,737 INFO L82 PathProgramCache]: Analyzing trace with hash -960340402, now seen corresponding path program 725 times [2021-06-05 14:42:42,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:42,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940136563] [2021-06-05 14:42:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:42,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940136563] [2021-06-05 14:42:42,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940136563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682749667] [2021-06-05 14:42:42,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:42,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682749667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:43,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818879379] [2021-06-05 14:42:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:43,388 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,742 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 14:42:43,955 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 14:42:44,224 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-06-05 14:42:44,377 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-06-05 14:42:44,530 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-06-05 14:42:44,693 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:42:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:44,708 INFO L93 Difference]: Finished difference Result 1302 states and 4111 transitions. [2021-06-05 14:42:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:44,710 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 14:42:44,710 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 14:42:44,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1336.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 14:42:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 835. [2021-06-05 14:42:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 14:42:44,722 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 14:42:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:44,722 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 14:42:44,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 14:42:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:44,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:44,723 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:44,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9531 [2021-06-05 14:42:44,923 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash 858236696, now seen corresponding path program 726 times [2021-06-05 14:42:44,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:44,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911963655] [2021-06-05 14:42:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:45,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911963655] [2021-06-05 14:42:45,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911963655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399852842] [2021-06-05 14:42:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399852842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:45,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380555439] [2021-06-05 14:42:45,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:45,616 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,946 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:42:46,171 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 14:42:46,385 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 14:42:46,564 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2021-06-05 14:42:46,867 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 14:42:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:46,880 INFO L93 Difference]: Finished difference Result 1298 states and 4103 transitions. [2021-06-05 14:42:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:46,882 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 14:42:46,882 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 14:42:46,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1311.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 14:42:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 837. [2021-06-05 14:42:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3086124401913874) internal successors, (2766), 836 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-06-05 14:42:46,893 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-06-05 14:42:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:46,893 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-06-05 14:42:46,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-06-05 14:42:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:46,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:46,894 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:47,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9549,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,095 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637134, now seen corresponding path program 727 times [2021-06-05 14:42:47,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:47,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110822786] [2021-06-05 14:42:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110822786] [2021-06-05 14:42:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110822786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097496223] [2021-06-05 14:42:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:47,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:47,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:47,796 INFO L628 ElimStorePlain]: treesize reduction 79, result has 13.2 percent of original size [2021-06-05 14:42:47,796 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 14:42:47,796 INFO L518 ElimStorePlain]: Eliminatee v_prenex_809 vanished before elimination [2021-06-05 14:42:47,796 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:47,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:47,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:112, output treesize:12 [2021-06-05 14:42:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097496223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:47,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23100842] [2021-06-05 14:42:47,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:47,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:47,842 INFO L87 Difference]: Start difference. First operand 837 states and 2766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,164 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:42:48,363 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:42:48,634 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-05 14:42:48,873 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-06-05 14:42:49,045 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 14:42:49,219 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 14:42:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:49,320 INFO L93 Difference]: Finished difference Result 1300 states and 4110 transitions. [2021-06-05 14:42:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:49,322 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 14:42:49,322 INFO L226 Difference]: Without dead ends: 1294 [2021-06-05 14:42:49,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1545.1ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-05 14:42:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 833. [2021-06-05 14:42:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.3125) internal successors, (2756), 832 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 14:42:49,333 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 14:42:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:49,333 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 14:42:49,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 14:42:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:49,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:49,334 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:49,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9567 [2021-06-05 14:42:49,534 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1738219842, now seen corresponding path program 728 times [2021-06-05 14:42:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:49,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290941963] [2021-06-05 14:42:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:49,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:49,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290941963] [2021-06-05 14:42:49,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290941963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:49,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115726727] [2021-06-05 14:42:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:50,015 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 14:42:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115726727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:50,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:50,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782522446] [2021-06-05 14:42:50,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:50,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:50,214 INFO L87 Difference]: Start difference. First operand 833 states and 2756 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,530 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:42:50,766 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 14:42:51,180 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-06-05 14:42:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:51,333 INFO L93 Difference]: Finished difference Result 1332 states and 4167 transitions. [2021-06-05 14:42:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:51,334 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 14:42:51,334 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:42:51,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:42:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 835. [2021-06-05 14:42:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 14:42:51,345 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 14:42:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:51,345 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 14:42:51,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 14:42:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:51,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:51,346 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:51,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 753 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9588 [2021-06-05 14:42:51,547 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 515277176, now seen corresponding path program 729 times [2021-06-05 14:42:51,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:51,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405193009] [2021-06-05 14:42:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405193009] [2021-06-05 14:42:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405193009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366086214] [2021-06-05 14:42:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:51,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:52,014 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 14:42:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366086214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:52,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:52,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215833450] [2021-06-05 14:42:52,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:52,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:52,243 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,568 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 14:42:52,765 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2021-06-05 14:42:52,952 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-06-05 14:42:53,127 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-06-05 14:42:53,419 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-06-05 14:42:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:53,438 INFO L93 Difference]: Finished difference Result 1285 states and 4068 transitions. [2021-06-05 14:42:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:53,440 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 14:42:53,440 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 14:42:53,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1294.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 14:42:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 837. [2021-06-05 14:42:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.3086124401913874) internal successors, (2766), 836 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-06-05 14:42:53,451 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-06-05 14:42:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:53,451 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-06-05 14:42:53,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-06-05 14:42:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:53,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:53,452 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:53,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9608 [2021-06-05 14:42:53,653 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1961113022, now seen corresponding path program 730 times [2021-06-05 14:42:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:53,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915812130] [2021-06-05 14:42:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:53,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:53,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915812130] [2021-06-05 14:42:53,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915812130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:53,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363492709] [2021-06-05 14:42:53,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:53,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:53,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:54,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363492709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:54,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:54,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:54,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167050834] [2021-06-05 14:42:54,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:54,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:54,316 INFO L87 Difference]: Start difference. First operand 837 states and 2766 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,638 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 14:42:54,879 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 14:42:55,068 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 14:42:55,248 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-06-05 14:42:55,409 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-05 14:42:55,630 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 14:42:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:55,650 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-06-05 14:42:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:55,652 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 14:42:55,652 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 14:42:55,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1376.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 14:42:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 839. [2021-06-05 14:42:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.3066825775656326) internal successors, (2771), 838 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2771 transitions. [2021-06-05 14:42:55,662 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2771 transitions. Word has length 22 [2021-06-05 14:42:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:55,662 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2771 transitions. [2021-06-05 14:42:55,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2771 transitions. [2021-06-05 14:42:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:55,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:55,663 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9626,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:55,864 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1209712584, now seen corresponding path program 731 times [2021-06-05 14:42:55,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:55,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430335871] [2021-06-05 14:42:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:55,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430335871] [2021-06-05 14:42:55,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430335871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439910684] [2021-06-05 14:42:55,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:56,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:56,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:42:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:56,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:56,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:56,535 INFO L628 ElimStorePlain]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 14:42:56,535 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:42:56,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:56,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:12 [2021-06-05 14:42:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439910684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:56,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:42:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21911244] [2021-06-05 14:42:56,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:56,579 INFO L87 Difference]: Start difference. First operand 839 states and 2771 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,860 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 14:42:57,036 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-06-05 14:42:57,219 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 14:42:57,407 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-06-05 14:42:57,575 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 14:42:57,743 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 14:42:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:57,847 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-06-05 14:42:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:57,849 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 14:42:57,849 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 14:42:57,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1381.1ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 14:42:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 835. [2021-06-05 14:42:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.3105515587529974) internal successors, (2761), 834 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 14:42:57,859 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 14:42:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 14:42:57,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 14:42:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:57,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:57,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:58,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9649,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,061 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:58,061 INFO L82 PathProgramCache]: Analyzing trace with hash 873218397, now seen corresponding path program 23 times [2021-06-05 14:42:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:58,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105064491] [2021-06-05 14:42:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105064491] [2021-06-05 14:42:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105064491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927883919] [2021-06-05 14:42:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:58,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:42:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927883919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:58,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:42:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205142821] [2021-06-05 14:42:58,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:58,337 INFO L87 Difference]: Start difference. First operand 835 states and 2761 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:58,765 INFO L93 Difference]: Finished difference Result 1130 states and 3525 transitions. [2021-06-05 14:42:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:58,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:58,767 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 14:42:58,767 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 14:42:58,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 14:42:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 863. [2021-06-05 14:42:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.2958236658932716) internal successors, (2841), 862 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2841 transitions. [2021-06-05 14:42:58,777 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2841 transitions. Word has length 22 [2021-06-05 14:42:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:58,777 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2841 transitions. [2021-06-05 14:42:58,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2841 transitions. [2021-06-05 14:42:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:58,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:58,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:58,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9671 [2021-06-05 14:42:58,979 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:58,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1581576615, now seen corresponding path program 24 times [2021-06-05 14:42:58,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:58,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575213094] [2021-06-05 14:42:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:59,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575213094] [2021-06-05 14:42:59,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575213094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558029967] [2021-06-05 14:42:59,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:59,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:42:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558029967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:59,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:42:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543802963] [2021-06-05 14:42:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:59,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:59,263 INFO L87 Difference]: Start difference. First operand 863 states and 2841 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:59,766 INFO L93 Difference]: Finished difference Result 1129 states and 3521 transitions. [2021-06-05 14:42:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:42:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:59,767 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 14:42:59,767 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 14:42:59,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 14:42:59,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 860. [2021-06-05 14:42:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.2945285215366704) internal successors, (2830), 859 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2830 transitions. [2021-06-05 14:42:59,778 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2830 transitions. Word has length 22 [2021-06-05 14:42:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:59,778 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2830 transitions. [2021-06-05 14:42:59,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2830 transitions. [2021-06-05 14:42:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:42:59,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:59,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:59,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9679,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:59,979 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -525207505, now seen corresponding path program 25 times [2021-06-05 14:42:59,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:59,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054406225] [2021-06-05 14:42:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054406225] [2021-06-05 14:43:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054406225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354666377] [2021-06-05 14:43:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:43:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354666377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:00,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:43:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494775164] [2021-06-05 14:43:00,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:43:00,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:43:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:43:00,271 INFO L87 Difference]: Start difference. First operand 860 states and 2830 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:00,625 INFO L93 Difference]: Finished difference Result 1106 states and 3473 transitions. [2021-06-05 14:43:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:00,626 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:43:00,626 INFO L226 Difference]: Without dead ends: 1085 [2021-06-05 14:43:00,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-06-05 14:43:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 857. [2021-06-05 14:43:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.2932242990654204) internal successors, (2819), 856 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2819 transitions. [2021-06-05 14:43:00,636 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2819 transitions. Word has length 22 [2021-06-05 14:43:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:00,636 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2819 transitions. [2021-06-05 14:43:00,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2819 transitions. [2021-06-05 14:43:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:00,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:00,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:00,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9685 [2021-06-05 14:43:00,838 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1853904925, now seen corresponding path program 26 times [2021-06-05 14:43:00,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:00,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180040830] [2021-06-05 14:43:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:00,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180040830] [2021-06-05 14:43:00,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180040830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693765537] [2021-06-05 14:43:00,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:43:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693765537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:01,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:43:01,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532723747] [2021-06-05 14:43:01,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:43:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:43:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:43:01,114 INFO L87 Difference]: Start difference. First operand 857 states and 2819 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:01,368 INFO L93 Difference]: Finished difference Result 1081 states and 3404 transitions. [2021-06-05 14:43:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:43:01,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:01,369 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 14:43:01,369 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 14:43:01,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 14:43:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 825. [2021-06-05 14:43:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.3276699029126213) internal successors, (2742), 824 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2742 transitions. [2021-06-05 14:43:01,379 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2742 transitions. Word has length 22 [2021-06-05 14:43:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:01,379 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2742 transitions. [2021-06-05 14:43:01,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2742 transitions. [2021-06-05 14:43:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:01,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:01,380 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:01,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9689 [2021-06-05 14:43:01,580 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1305500157, now seen corresponding path program 732 times [2021-06-05 14:43:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405208537] [2021-06-05 14:43:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:01,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405208537] [2021-06-05 14:43:01,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405208537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209286696] [2021-06-05 14:43:01,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:01,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:43:01,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:01,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:01,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:01,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:43:01,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:01,924 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 14:43:01,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:01,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-06-05 14:43:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209286696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:01,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 14:43:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789939118] [2021-06-05 14:43:01,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:43:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:01,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:43:01,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:43:01,968 INFO L87 Difference]: Start difference. First operand 825 states and 2742 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:02,254 INFO L93 Difference]: Finished difference Result 1202 states and 3846 transitions. [2021-06-05 14:43:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:02,255 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 14:43:02,256 INFO L226 Difference]: Without dead ends: 1132 [2021-06-05 14:43:02,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-05 14:43:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 850. [2021-06-05 14:43:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.340400471142521) internal successors, (2836), 849 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-06-05 14:43:02,265 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-06-05 14:43:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:02,265 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-06-05 14:43:02,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-06-05 14:43:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:02,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:02,266 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:02,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9693,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:02,467 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1958577410, now seen corresponding path program 733 times [2021-06-05 14:43:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:02,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658585604] [2021-06-05 14:43:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:02,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658585604] [2021-06-05 14:43:02,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658585604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943770784] [2021-06-05 14:43:02,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:02,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:43:02,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,893 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:43:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:02,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:02,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:02,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:02,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:43:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943770784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:02,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188828848] [2021-06-05 14:43:02,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:02,948 INFO L87 Difference]: Start difference. First operand 850 states and 2836 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:03,380 INFO L93 Difference]: Finished difference Result 1158 states and 3675 transitions. [2021-06-05 14:43:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:03,381 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 14:43:03,382 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 14:43:03,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 14:43:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 865. [2021-06-05 14:43:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.3275462962962963) internal successors, (2875), 864 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2875 transitions. [2021-06-05 14:43:03,392 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2875 transitions. Word has length 22 [2021-06-05 14:43:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:03,393 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2875 transitions. [2021-06-05 14:43:03,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2875 transitions. [2021-06-05 14:43:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:03,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:03,394 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:03,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 762 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9710 [2021-06-05 14:43:03,594 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash -799933880, now seen corresponding path program 734 times [2021-06-05 14:43:03,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:03,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837043619] [2021-06-05 14:43:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:03,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:03,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837043619] [2021-06-05 14:43:03,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837043619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:03,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103024462] [2021-06-05 14:43:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:03,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:03,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:03,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:03,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:03,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:04,007 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:43:04,007 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:04,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:04,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:43:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103024462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:04,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398693954] [2021-06-05 14:43:04,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:04,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:04,061 INFO L87 Difference]: Start difference. First operand 865 states and 2875 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:04,520 INFO L93 Difference]: Finished difference Result 1210 states and 3796 transitions. [2021-06-05 14:43:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:04,522 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:43:04,522 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:43:04,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:43:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 868. [2021-06-05 14:43:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.328719723183391) internal successors, (2886), 867 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2886 transitions. [2021-06-05 14:43:04,533 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2886 transitions. Word has length 22 [2021-06-05 14:43:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:04,533 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2886 transitions. [2021-06-05 14:43:04,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2886 transitions. [2021-06-05 14:43:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:04,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:04,534 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:04,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9728,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:04,734 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2001125694, now seen corresponding path program 735 times [2021-06-05 14:43:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:04,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993440005] [2021-06-05 14:43:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993440005] [2021-06-05 14:43:04,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993440005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557464097] [2021-06-05 14:43:04,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:04,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:05,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:05,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:05,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:05,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:05,145 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:43:05,145 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:05,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:05,146 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:43:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557464097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:05,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:05,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121076017] [2021-06-05 14:43:05,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:05,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:05,196 INFO L87 Difference]: Start difference. First operand 868 states and 2886 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:05,643 INFO L93 Difference]: Finished difference Result 1167 states and 3693 transitions. [2021-06-05 14:43:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:05,645 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 14:43:05,645 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 14:43:05,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 14:43:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 860. [2021-06-05 14:43:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.331781140861467) internal successors, (2862), 859 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2862 transitions. [2021-06-05 14:43:05,662 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2862 transitions. Word has length 22 [2021-06-05 14:43:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:05,662 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2862 transitions. [2021-06-05 14:43:05,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2862 transitions. [2021-06-05 14:43:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:05,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:05,663 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:05,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9745 [2021-06-05 14:43:05,864 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:05,864 INFO L82 PathProgramCache]: Analyzing trace with hash 294157708, now seen corresponding path program 736 times [2021-06-05 14:43:05,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:05,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030691618] [2021-06-05 14:43:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030691618] [2021-06-05 14:43:05,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030691618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549761280] [2021-06-05 14:43:05,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549761280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:06,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129933813] [2021-06-05 14:43:06,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:06,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:06,371 INFO L87 Difference]: Start difference. First operand 860 states and 2862 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:06,919 INFO L93 Difference]: Finished difference Result 1110 states and 3528 transitions. [2021-06-05 14:43:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:06,921 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 14:43:06,921 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 14:43:06,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 14:43:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 866. [2021-06-05 14:43:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.3341040462427745) internal successors, (2884), 865 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2884 transitions. [2021-06-05 14:43:06,931 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2884 transitions. Word has length 22 [2021-06-05 14:43:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:06,931 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2884 transitions. [2021-06-05 14:43:06,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2884 transitions. [2021-06-05 14:43:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:06,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:06,933 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:07,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9762,765 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:07,133 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1199750014, now seen corresponding path program 737 times [2021-06-05 14:43:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464559245] [2021-06-05 14:43:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:07,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464559245] [2021-06-05 14:43:07,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464559245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688303720] [2021-06-05 14:43:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:07,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:07,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688303720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:07,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:07,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27533657] [2021-06-05 14:43:07,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:07,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:07,698 INFO L87 Difference]: Start difference. First operand 866 states and 2884 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:08,222 INFO L93 Difference]: Finished difference Result 1116 states and 3535 transitions. [2021-06-05 14:43:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:08,224 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 14:43:08,224 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 14:43:08,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 14:43:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 863. [2021-06-05 14:43:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.3329466357308584) internal successors, (2873), 862 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2873 transitions. [2021-06-05 14:43:08,234 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2873 transitions. Word has length 22 [2021-06-05 14:43:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:08,234 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2873 transitions. [2021-06-05 14:43:08,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2873 transitions. [2021-06-05 14:43:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:08,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:08,235 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:08,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9777 [2021-06-05 14:43:08,435 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash -661894436, now seen corresponding path program 738 times [2021-06-05 14:43:08,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681068912] [2021-06-05 14:43:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:08,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681068912] [2021-06-05 14:43:08,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681068912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713998506] [2021-06-05 14:43:08,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713998506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:08,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:08,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386321570] [2021-06-05 14:43:08,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:08,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:08,981 INFO L87 Difference]: Start difference. First operand 863 states and 2873 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:09,582 INFO L93 Difference]: Finished difference Result 1074 states and 3440 transitions. [2021-06-05 14:43:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:09,584 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 14:43:09,584 INFO L226 Difference]: Without dead ends: 1062 [2021-06-05 14:43:09,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-06-05 14:43:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 855. [2021-06-05 14:43:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.3360655737704916) internal successors, (2849), 854 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2849 transitions. [2021-06-05 14:43:09,593 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2849 transitions. Word has length 22 [2021-06-05 14:43:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:09,593 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2849 transitions. [2021-06-05 14:43:09,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2849 transitions. [2021-06-05 14:43:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:09,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:09,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:09,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9791,767 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:09,795 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -148741432, now seen corresponding path program 739 times [2021-06-05 14:43:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:09,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293406401] [2021-06-05 14:43:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:09,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293406401] [2021-06-05 14:43:09,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293406401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664657799] [2021-06-05 14:43:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664657799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360834474] [2021-06-05 14:43:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:10,342 INFO L87 Difference]: Start difference. First operand 855 states and 2849 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:10,896 INFO L93 Difference]: Finished difference Result 1099 states and 3496 transitions. [2021-06-05 14:43:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:10,898 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 14:43:10,898 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:43:10,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:43:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 864. [2021-06-05 14:43:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.339513325608343) internal successors, (2882), 863 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2882 transitions. [2021-06-05 14:43:10,908 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2882 transitions. Word has length 22 [2021-06-05 14:43:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:10,908 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2882 transitions. [2021-06-05 14:43:10,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2882 transitions. [2021-06-05 14:43:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:10,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:10,909 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:11,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9808,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,109 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1642649154, now seen corresponding path program 740 times [2021-06-05 14:43:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:11,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967202404] [2021-06-05 14:43:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:11,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967202404] [2021-06-05 14:43:11,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967202404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425777151] [2021-06-05 14:43:11,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425777151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:11,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:11,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626302526] [2021-06-05 14:43:11,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:11,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:11,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:11,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:11,655 INFO L87 Difference]: Start difference. First operand 864 states and 2882 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:12,246 INFO L93 Difference]: Finished difference Result 1105 states and 3503 transitions. [2021-06-05 14:43:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:12,247 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 14:43:12,247 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:43:12,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:43:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 861. [2021-06-05 14:43:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.338372093023256) internal successors, (2871), 860 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2871 transitions. [2021-06-05 14:43:12,257 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2871 transitions. Word has length 22 [2021-06-05 14:43:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:12,257 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2871 transitions. [2021-06-05 14:43:12,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2871 transitions. [2021-06-05 14:43:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:12,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:12,258 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:12,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9823,769 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:12,459 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1104793576, now seen corresponding path program 741 times [2021-06-05 14:43:12,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:12,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193646600] [2021-06-05 14:43:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193646600] [2021-06-05 14:43:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193646600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178461506] [2021-06-05 14:43:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:12,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178461506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:12,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:12,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161616646] [2021-06-05 14:43:12,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:12,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:12,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:12,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:12,987 INFO L87 Difference]: Start difference. First operand 861 states and 2871 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,462 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 14:43:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:13,656 INFO L93 Difference]: Finished difference Result 1069 states and 3421 transitions. [2021-06-05 14:43:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:13,657 INFO L225 Difference]: With dead ends: 1069 [2021-06-05 14:43:13,657 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 14:43:13,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 14:43:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 858. [2021-06-05 14:43:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.337222870478413) internal successors, (2860), 857 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2860 transitions. [2021-06-05 14:43:13,667 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2860 transitions. Word has length 22 [2021-06-05 14:43:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:13,667 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2860 transitions. [2021-06-05 14:43:13,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2860 transitions. [2021-06-05 14:43:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:13,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:13,668 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:13,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 770 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9840 [2021-06-05 14:43:13,868 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1611139842, now seen corresponding path program 742 times [2021-06-05 14:43:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:13,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010318855] [2021-06-05 14:43:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:13,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010318855] [2021-06-05 14:43:13,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010318855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203530858] [2021-06-05 14:43:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:14,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:14,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:14,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:14,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203530858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:14,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:14,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:14,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096721933] [2021-06-05 14:43:14,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:14,414 INFO L87 Difference]: Start difference. First operand 858 states and 2860 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:15,040 INFO L93 Difference]: Finished difference Result 1060 states and 3397 transitions. [2021-06-05 14:43:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:15,041 INFO L225 Difference]: With dead ends: 1060 [2021-06-05 14:43:15,041 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 14:43:15,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 14:43:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 850. [2021-06-05 14:43:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.340400471142521) internal successors, (2836), 849 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-06-05 14:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-06-05 14:43:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:15,051 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-06-05 14:43:15,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-06-05 14:43:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:15,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:15,052 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:15,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9858,771 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,252 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:15,252 INFO L82 PathProgramCache]: Analyzing trace with hash 711432611, now seen corresponding path program 743 times [2021-06-05 14:43:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:15,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148599169] [2021-06-05 14:43:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:15,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148599169] [2021-06-05 14:43:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148599169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039037564] [2021-06-05 14:43:15,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:15,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:15,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:15,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:43:15,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,603 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 14:43:15,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:15,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:15 [2021-06-05 14:43:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039037564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:15,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 14:43:15,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743273679] [2021-06-05 14:43:15,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:43:15,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:15,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:43:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:43:15,646 INFO L87 Difference]: Start difference. First operand 850 states and 2836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:15,976 INFO L93 Difference]: Finished difference Result 1304 states and 4164 transitions. [2021-06-05 14:43:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:15,978 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 14:43:15,978 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 14:43:15,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 14:43:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 857. [2021-06-05 14:43:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.34696261682243) internal successors, (2865), 856 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-06-05 14:43:15,988 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-06-05 14:43:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:15,988 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-06-05 14:43:15,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-06-05 14:43:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:15,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:15,989 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:16,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,190 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1937291592, now seen corresponding path program 744 times [2021-06-05 14:43:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:16,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234856969] [2021-06-05 14:43:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234856969] [2021-06-05 14:43:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234856969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885307885] [2021-06-05 14:43:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:16,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:16,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:16,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:43:16,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:16,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:16,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:16,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:16,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:16,672 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 14:43:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885307885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:16,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541310282] [2021-06-05 14:43:16,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:16,720 INFO L87 Difference]: Start difference. First operand 857 states and 2865 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:17,224 INFO L93 Difference]: Finished difference Result 1191 states and 3776 transitions. [2021-06-05 14:43:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:17,225 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 14:43:17,226 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:43:17,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:43:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 867. [2021-06-05 14:43:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.338337182448037) internal successors, (2891), 866 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2891 transitions. [2021-06-05 14:43:17,236 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2891 transitions. Word has length 22 [2021-06-05 14:43:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:17,236 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2891 transitions. [2021-06-05 14:43:17,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2891 transitions. [2021-06-05 14:43:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:17,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:17,237 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:17,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,773 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:17,438 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:17,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1199032174, now seen corresponding path program 745 times [2021-06-05 14:43:17,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:17,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231266026] [2021-06-05 14:43:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231266026] [2021-06-05 14:43:17,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231266026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009219504] [2021-06-05 14:43:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:17,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:17,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:17,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,907 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 14:43:17,907 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:17,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:17,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:43:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009219504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:17,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:17,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509447538] [2021-06-05 14:43:17,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:17,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:17,962 INFO L87 Difference]: Start difference. First operand 867 states and 2891 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:18,523 INFO L93 Difference]: Finished difference Result 1243 states and 3897 transitions. [2021-06-05 14:43:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:18,525 INFO L225 Difference]: With dead ends: 1243 [2021-06-05 14:43:18,525 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 14:43:18,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 14:43:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 870. [2021-06-05 14:43:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.3394706559263523) internal successors, (2902), 869 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2902 transitions. [2021-06-05 14:43:18,536 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2902 transitions. Word has length 22 [2021-06-05 14:43:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:18,536 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2902 transitions. [2021-06-05 14:43:18,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2902 transitions. [2021-06-05 14:43:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:18,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:18,537 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:18,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:18,754 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1602027400, now seen corresponding path program 746 times [2021-06-05 14:43:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:18,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969323417] [2021-06-05 14:43:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969323417] [2021-06-05 14:43:18,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969323417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144384884] [2021-06-05 14:43:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:19,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:19,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:43:19,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,323 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:43:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:19,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:19,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:19,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:19,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 14:43:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:19,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144384884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:19,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:19,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:19,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519922095] [2021-06-05 14:43:19,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:19,389 INFO L87 Difference]: Start difference. First operand 870 states and 2902 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:19,857 INFO L93 Difference]: Finished difference Result 1200 states and 3794 transitions. [2021-06-05 14:43:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:19,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:19,859 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 14:43:19,859 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 14:43:19,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 14:43:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2021-06-05 14:43:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.342624854819977) internal successors, (2878), 861 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2878 transitions. [2021-06-05 14:43:19,885 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2878 transitions. Word has length 22 [2021-06-05 14:43:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2878 transitions. [2021-06-05 14:43:19,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2878 transitions. [2021-06-05 14:43:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:19,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:19,886 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:20,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,775 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,103 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -104940586, now seen corresponding path program 747 times [2021-06-05 14:43:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:20,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657987040] [2021-06-05 14:43:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657987040] [2021-06-05 14:43:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657987040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3202656] [2021-06-05 14:43:20,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:43:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3202656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:20,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514668737] [2021-06-05 14:43:20,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:20,691 INFO L87 Difference]: Start difference. First operand 862 states and 2878 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,270 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 14:43:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:21,355 INFO L93 Difference]: Finished difference Result 1143 states and 3629 transitions. [2021-06-05 14:43:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:21,356 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:43:21,356 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 14:43:21,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 14:43:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 868. [2021-06-05 14:43:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.344867358708189) internal successors, (2900), 867 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2900 transitions. [2021-06-05 14:43:21,366 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2900 transitions. Word has length 22 [2021-06-05 14:43:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:21,366 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2900 transitions. [2021-06-05 14:43:21,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2900 transitions. [2021-06-05 14:43:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:21,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:21,368 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:21,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 14:43:21,568 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:21,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1598848308, now seen corresponding path program 748 times [2021-06-05 14:43:21,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:21,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631569193] [2021-06-05 14:43:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:21,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631569193] [2021-06-05 14:43:21,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631569193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918519107] [2021-06-05 14:43:21,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:21,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:21,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:21,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918519107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:22,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:22,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253323772] [2021-06-05 14:43:22,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:22,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:22,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:22,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:22,195 INFO L87 Difference]: Start difference. First operand 868 states and 2900 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,772 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 14:43:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:22,852 INFO L93 Difference]: Finished difference Result 1149 states and 3636 transitions. [2021-06-05 14:43:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:22,853 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 14:43:22,853 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 14:43:22,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 722.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 14:43:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 865. [2021-06-05 14:43:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.34375) internal successors, (2889), 864 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2889 transitions. [2021-06-05 14:43:22,863 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2889 transitions. Word has length 22 [2021-06-05 14:43:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:22,864 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2889 transitions. [2021-06-05 14:43:22,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,864 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2889 transitions. [2021-06-05 14:43:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:22,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:22,865 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:23,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,777 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:23,065 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1060992730, now seen corresponding path program 749 times [2021-06-05 14:43:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348757225] [2021-06-05 14:43:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:23,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:23,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348757225] [2021-06-05 14:43:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348757225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:23,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706114777] [2021-06-05 14:43:23,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:23,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706114777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:23,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:23,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399208678] [2021-06-05 14:43:23,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:23,670 INFO L87 Difference]: Start difference. First operand 865 states and 2889 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,271 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-06-05 14:43:24,454 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-06-05 14:43:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:24,479 INFO L93 Difference]: Finished difference Result 1107 states and 3541 transitions. [2021-06-05 14:43:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:24,480 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 14:43:24,481 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 14:43:24,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 14:43:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 857. [2021-06-05 14:43:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.34696261682243) internal successors, (2865), 856 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-06-05 14:43:24,490 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-06-05 14:43:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:24,490 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-06-05 14:43:24,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-06-05 14:43:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:24,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:24,491 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:24,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,692 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1469231619, now seen corresponding path program 750 times [2021-06-05 14:43:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:24,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997442707] [2021-06-05 14:43:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:24,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:24,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997442707] [2021-06-05 14:43:24,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997442707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:24,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902033992] [2021-06-05 14:43:24,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:25,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:25,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,064 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 14:43:25,064 INFO L518 ElimStorePlain]: Eliminatee v_prenex_874 vanished before elimination [2021-06-05 14:43:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:25,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:25,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:25,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:25,105 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.4 percent of original size [2021-06-05 14:43:25,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:25,106 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-06-05 14:43:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902033992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 14:43:25,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814102404] [2021-06-05 14:43:25,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:43:25,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:43:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:43:25,180 INFO L87 Difference]: Start difference. First operand 857 states and 2865 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:25,617 INFO L93 Difference]: Finished difference Result 1424 states and 4477 transitions. [2021-06-05 14:43:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:25,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:25,619 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 14:43:25,619 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 14:43:25,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 14:43:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 864. [2021-06-05 14:43:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.3615295480880647) internal successors, (2901), 863 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2901 transitions. [2021-06-05 14:43:25,631 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2901 transitions. Word has length 22 [2021-06-05 14:43:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:25,631 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2901 transitions. [2021-06-05 14:43:25,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2901 transitions. [2021-06-05 14:43:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:25,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:25,632 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:25,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 779 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-06-05 14:43:25,832 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1816360514, now seen corresponding path program 751 times [2021-06-05 14:43:25,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:25,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959890048] [2021-06-05 14:43:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:25,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959890048] [2021-06-05 14:43:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959890048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039028912] [2021-06-05 14:43:25,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:26,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:26,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,315 INFO L628 ElimStorePlain]: treesize reduction 33, result has 70.3 percent of original size [2021-06-05 14:43:26,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:26,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:26,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:26,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:26,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:26,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:26,379 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 14:43:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:26,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039028912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:26,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:26,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566217044] [2021-06-05 14:43:26,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:26,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:26,461 INFO L87 Difference]: Start difference. First operand 864 states and 2901 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:26,953 INFO L93 Difference]: Finished difference Result 1384 states and 4338 transitions. [2021-06-05 14:43:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:26,962 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 14:43:26,962 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 14:43:26,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 14:43:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 876. [2021-06-05 14:43:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.362285714285714) internal successors, (2942), 875 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2942 transitions. [2021-06-05 14:43:26,974 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2942 transitions. Word has length 22 [2021-06-05 14:43:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:26,974 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2942 transitions. [2021-06-05 14:43:26,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2942 transitions. [2021-06-05 14:43:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:26,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:26,975 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:27,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-06-05 14:43:27,176 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -657716984, now seen corresponding path program 752 times [2021-06-05 14:43:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:27,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421682889] [2021-06-05 14:43:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:27,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421682889] [2021-06-05 14:43:27,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421682889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819831339] [2021-06-05 14:43:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:27,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:27,589 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_882, v_prenex_883, v_prenex_887], 1=[v_prenex_889, v_prenex_884, nondet_0]} [2021-06-05 14:43:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:27,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,717 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:43:27,717 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 14:43:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:27,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:27,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,836 INFO L518 ElimStorePlain]: Eliminatee v_prenex_889 vanished before elimination [2021-06-05 14:43:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:27,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:27,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:27,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:27,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:27,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:27,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:27,984 INFO L628 ElimStorePlain]: treesize reduction 15, result has 85.6 percent of original size [2021-06-05 14:43:27,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:27,985 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 14:43:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:28,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819831339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:28,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:28,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:28,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257239479] [2021-06-05 14:43:28,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:28,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:28,074 INFO L87 Difference]: Start difference. First operand 876 states and 2942 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:28,529 INFO L93 Difference]: Finished difference Result 1416 states and 4397 transitions. [2021-06-05 14:43:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:28,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:28,531 INFO L225 Difference]: With dead ends: 1416 [2021-06-05 14:43:28,531 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 14:43:28,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 14:43:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 882. [2021-06-05 14:43:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.3677639046538026) internal successors, (2967), 881 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2967 transitions. [2021-06-05 14:43:28,543 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2967 transitions. Word has length 22 [2021-06-05 14:43:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:28,543 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2967 transitions. [2021-06-05 14:43:28,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2967 transitions. [2021-06-05 14:43:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:28,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:28,544 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:28,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10032,781 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:28,745 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2143342590, now seen corresponding path program 753 times [2021-06-05 14:43:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:28,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441515540] [2021-06-05 14:43:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:28,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:28,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441515540] [2021-06-05 14:43:28,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441515540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:28,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238364154] [2021-06-05 14:43:28,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:28,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:43:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:29,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:29,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:29,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 14:43:29,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:29,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 14:43:29,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:29,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:29,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:29,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:29,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2021-06-05 14:43:29,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:43:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:29,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:29,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:29,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:43:29,358 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:207, output treesize:116 [2021-06-05 14:43:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:29,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238364154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:29,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:29,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:43:29,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930325109] [2021-06-05 14:43:29,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:43:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:43:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:29,588 INFO L87 Difference]: Start difference. First operand 882 states and 2967 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:30,431 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 14:43:30,684 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-06-05 14:43:31,073 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 14:43:31,281 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 14:43:31,425 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 14:43:31,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-05 14:43:31,915 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 14:43:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:32,117 INFO L93 Difference]: Finished difference Result 2391 states and 7250 transitions. [2021-06-05 14:43:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:43:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:32,120 INFO L225 Difference]: With dead ends: 2391 [2021-06-05 14:43:32,120 INFO L226 Difference]: Without dead ends: 2189 [2021-06-05 14:43:32,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2453.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:43:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-06-05 14:43:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1017. [2021-06-05 14:43:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.4783464566929134) internal successors, (3534), 1016 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3534 transitions. [2021-06-05 14:43:32,137 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3534 transitions. Word has length 22 [2021-06-05 14:43:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:32,137 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3534 transitions. [2021-06-05 14:43:32,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:32,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3534 transitions. [2021-06-05 14:43:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:32,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:32,138 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:32,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10050,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:32,338 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1405848029, now seen corresponding path program 754 times [2021-06-05 14:43:32,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:32,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030519494] [2021-06-05 14:43:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:32,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030519494] [2021-06-05 14:43:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030519494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474836438] [2021-06-05 14:43:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:32,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:32,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:32,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:32,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,702 INFO L628 ElimStorePlain]: treesize reduction 28, result has 61.1 percent of original size [2021-06-05 14:43:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:32,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:32,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:32,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:21 [2021-06-05 14:43:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474836438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:32,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:32,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 14:43:32,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176725216] [2021-06-05 14:43:32,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:43:32,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:43:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:43:32,788 INFO L87 Difference]: Start difference. First operand 1017 states and 3534 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:33,224 INFO L93 Difference]: Finished difference Result 1448 states and 4722 transitions. [2021-06-05 14:43:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:33,227 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 14:43:33,227 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 14:43:33,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 14:43:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1017. [2021-06-05 14:43:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.4714566929133857) internal successors, (3527), 1016 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3527 transitions. [2021-06-05 14:43:33,239 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3527 transitions. Word has length 22 [2021-06-05 14:43:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:33,239 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3527 transitions. [2021-06-05 14:43:33,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3527 transitions. [2021-06-05 14:43:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:33,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:33,241 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:33,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10075 [2021-06-05 14:43:33,441 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2216584, now seen corresponding path program 755 times [2021-06-05 14:43:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541798372] [2021-06-05 14:43:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:33,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541798372] [2021-06-05 14:43:33,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541798372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508388791] [2021-06-05 14:43:33,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:33,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:33,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:33,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:33,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:33,918 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-06-05 14:43:33,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:33,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:33,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:33,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:33,936 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:33,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:33,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:43:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508388791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:34,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:34,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:34,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118015805] [2021-06-05 14:43:34,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:34,022 INFO L87 Difference]: Start difference. First operand 1017 states and 3527 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:34,459 INFO L93 Difference]: Finished difference Result 1483 states and 4798 transitions. [2021-06-05 14:43:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:34,462 INFO L225 Difference]: With dead ends: 1483 [2021-06-05 14:43:34,462 INFO L226 Difference]: Without dead ends: 1483 [2021-06-05 14:43:34,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-05 14:43:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1021. [2021-06-05 14:43:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.4686274509803923) internal successors, (3538), 1020 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3538 transitions. [2021-06-05 14:43:34,475 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3538 transitions. Word has length 22 [2021-06-05 14:43:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:34,475 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3538 transitions. [2021-06-05 14:43:34,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3538 transitions. [2021-06-05 14:43:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:34,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:34,477 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:34,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 784 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10100 [2021-06-05 14:43:34,677 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1635267976, now seen corresponding path program 756 times [2021-06-05 14:43:34,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:34,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092322623] [2021-06-05 14:43:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:34,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092322623] [2021-06-05 14:43:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092322623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49337298] [2021-06-05 14:43:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:34,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:43:34,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:34,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:35,097 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_899, v_prenex_900, v_prenex_906], 1=[v_prenex_901, v_prenex_902, nondet_0]} [2021-06-05 14:43:35,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:35,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,237 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:43:35,237 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 14:43:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:35,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:35,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:35,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:35,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:35,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:35,407 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-05 14:43:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:35,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:35,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:35,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:35,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:35,452 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 14:43:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49337298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:35,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811494124] [2021-06-05 14:43:35,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:35,552 INFO L87 Difference]: Start difference. First operand 1021 states and 3538 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:36,084 INFO L93 Difference]: Finished difference Result 1421 states and 4671 transitions. [2021-06-05 14:43:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:36,087 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 14:43:36,087 INFO L226 Difference]: Without dead ends: 1421 [2021-06-05 14:43:36,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-05 14:43:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-06-05 14:43:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.470993117010816) internal successors, (3530), 1017 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3530 transitions. [2021-06-05 14:43:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3530 transitions. Word has length 22 [2021-06-05 14:43:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:36,100 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 3530 transitions. [2021-06-05 14:43:36,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3530 transitions. [2021-06-05 14:43:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:36,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:36,101 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:36,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10120,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:36,301 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash 967081110, now seen corresponding path program 757 times [2021-06-05 14:43:36,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:36,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494626235] [2021-06-05 14:43:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:36,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494626235] [2021-06-05 14:43:36,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494626235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151007333] [2021-06-05 14:43:36,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:36,753 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_910, v_prenex_909, nondet_0], 1=[v_prenex_912, v_prenex_914, v_prenex_916]} [2021-06-05 14:43:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:36,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:36,891 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:43:36,891 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 14:43:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:36,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:36,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:36,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:37,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:37,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:37,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:37,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-06-05 14:43:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:37,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:37,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:37,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:37,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:37,112 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 14:43:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151007333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:37,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:37,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:43:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816915257] [2021-06-05 14:43:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:43:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:43:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:37,212 INFO L87 Difference]: Start difference. First operand 1018 states and 3530 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:37,758 INFO L93 Difference]: Finished difference Result 1515 states and 4901 transitions. [2021-06-05 14:43:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:37,760 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 14:43:37,760 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 14:43:37,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:37,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 14:43:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1026. [2021-06-05 14:43:37,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.4790243902439024) internal successors, (3566), 1025 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3566 transitions. [2021-06-05 14:43:37,775 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3566 transitions. Word has length 22 [2021-06-05 14:43:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:37,775 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3566 transitions. [2021-06-05 14:43:37,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3566 transitions. [2021-06-05 14:43:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:37,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:37,776 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:37,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10138,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:37,976 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -526826612, now seen corresponding path program 758 times [2021-06-05 14:43:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54906084] [2021-06-05 14:43:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:38,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:38,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54906084] [2021-06-05 14:43:38,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54906084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:38,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895471656] [2021-06-05 14:43:38,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:38,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:38,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:38,404 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_919, nondet_0, v_prenex_920], 1=[v_prenex_921, v_prenex_924, v_prenex_926]} [2021-06-05 14:43:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:38,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,529 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 14:43:38,530 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-06-05 14:43:38,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:38,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:38,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:38,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_921 vanished before elimination [2021-06-05 14:43:38,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:38,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:38,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:38,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:38,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:38,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:38,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:38,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:38,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:38,750 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 14:43:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895471656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:38,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:38,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056086640] [2021-06-05 14:43:38,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:38,847 INFO L87 Difference]: Start difference. First operand 1026 states and 3566 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:39,387 INFO L93 Difference]: Finished difference Result 1510 states and 4883 transitions. [2021-06-05 14:43:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:39,389 INFO L225 Difference]: With dead ends: 1510 [2021-06-05 14:43:39,389 INFO L226 Difference]: Without dead ends: 1504 [2021-06-05 14:43:39,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-06-05 14:43:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1023. [2021-06-05 14:43:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.4784735812133074) internal successors, (3555), 1022 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3555 transitions. [2021-06-05 14:43:39,402 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3555 transitions. Word has length 22 [2021-06-05 14:43:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:39,403 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3555 transitions. [2021-06-05 14:43:39,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3555 transitions. [2021-06-05 14:43:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:39,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:39,404 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10156 [2021-06-05 14:43:39,613 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1718481548, now seen corresponding path program 759 times [2021-06-05 14:43:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143819901] [2021-06-05 14:43:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:39,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143819901] [2021-06-05 14:43:39,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143819901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:39,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869517853] [2021-06-05 14:43:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:39,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:39,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:40,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:40,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,094 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 14:43:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:40,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:40,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:40,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:40,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:40,116 INFO L518 ElimStorePlain]: Eliminatee v_prenex_930 vanished before elimination [2021-06-05 14:43:40,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:40,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:43:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869517853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:40,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:40,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878841567] [2021-06-05 14:43:40,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:40,221 INFO L87 Difference]: Start difference. First operand 1023 states and 3555 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:40,779 INFO L93 Difference]: Finished difference Result 1535 states and 4949 transitions. [2021-06-05 14:43:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:40,781 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 14:43:40,781 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 14:43:40,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 14:43:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1019. [2021-06-05 14:43:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.4724950884086443) internal successors, (3535), 1018 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3535 transitions. [2021-06-05 14:43:40,795 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3535 transitions. Word has length 22 [2021-06-05 14:43:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:40,795 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3535 transitions. [2021-06-05 14:43:40,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3535 transitions. [2021-06-05 14:43:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:40,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:40,796 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:40,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10174,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:40,997 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1739218076, now seen corresponding path program 760 times [2021-06-05 14:43:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:40,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280472746] [2021-06-05 14:43:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:41,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:41,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280472746] [2021-06-05 14:43:41,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280472746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:41,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592126821] [2021-06-05 14:43:41,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:41,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:41,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:41,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,493 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 14:43:41,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_934 vanished before elimination [2021-06-05 14:43:41,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:41,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:41,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:41,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:41,532 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 14:43:41,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:41,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 14:43:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592126821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:41,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:41,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:41,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075125490] [2021-06-05 14:43:41,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:41,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:41,629 INFO L87 Difference]: Start difference. First operand 1019 states and 3535 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:42,154 INFO L93 Difference]: Finished difference Result 1429 states and 4686 transitions. [2021-06-05 14:43:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:42,156 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 14:43:42,156 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 14:43:42,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 14:43:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2021-06-05 14:43:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.4724950884086443) internal successors, (3535), 1018 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3535 transitions. [2021-06-05 14:43:42,170 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3535 transitions. Word has length 22 [2021-06-05 14:43:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:42,170 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3535 transitions. [2021-06-05 14:43:42,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3535 transitions. [2021-06-05 14:43:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:42,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:42,171 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:42,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10195,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:42,371 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1275807224, now seen corresponding path program 761 times [2021-06-05 14:43:42,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:42,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673760746] [2021-06-05 14:43:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673760746] [2021-06-05 14:43:42,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673760746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47356741] [2021-06-05 14:43:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:42,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:42,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:43,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47356741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:43,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:43,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:43,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554802211] [2021-06-05 14:43:43,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:43,058 INFO L87 Difference]: Start difference. First operand 1019 states and 3535 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,552 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 14:43:43,794 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-05 14:43:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:43,888 INFO L93 Difference]: Finished difference Result 1291 states and 4263 transitions. [2021-06-05 14:43:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:43,890 INFO L225 Difference]: With dead ends: 1291 [2021-06-05 14:43:43,890 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 14:43:43,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 14:43:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1026. [2021-06-05 14:43:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.475121951219512) internal successors, (3562), 1025 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3562 transitions. [2021-06-05 14:43:43,903 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3562 transitions. Word has length 22 [2021-06-05 14:43:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:43,903 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3562 transitions. [2021-06-05 14:43:43,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3562 transitions. [2021-06-05 14:43:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:43,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:43,904 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:44,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-06-05 14:43:44,105 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1525252350, now seen corresponding path program 762 times [2021-06-05 14:43:44,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:44,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529648060] [2021-06-05 14:43:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:44,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:44,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529648060] [2021-06-05 14:43:44,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529648060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:44,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255163224] [2021-06-05 14:43:44,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:44,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:44,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:44,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255163224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:44,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:44,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:44,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642371870] [2021-06-05 14:43:44,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:44,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:44,792 INFO L87 Difference]: Start difference. First operand 1026 states and 3562 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,309 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 14:43:45,556 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-06-05 14:43:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:45,662 INFO L93 Difference]: Finished difference Result 1297 states and 4270 transitions. [2021-06-05 14:43:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:45,665 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 14:43:45,665 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 14:43:45,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 909.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 14:43:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1023. [2021-06-05 14:43:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.474559686888454) internal successors, (3551), 1022 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3551 transitions. [2021-06-05 14:43:45,677 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3551 transitions. Word has length 22 [2021-06-05 14:43:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:45,677 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3551 transitions. [2021-06-05 14:43:45,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3551 transitions. [2021-06-05 14:43:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:45,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:45,678 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:45,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 791 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10237 [2021-06-05 14:43:45,879 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2063107928, now seen corresponding path program 763 times [2021-06-05 14:43:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:45,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369742555] [2021-06-05 14:43:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:46,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:46,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369742555] [2021-06-05 14:43:46,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369742555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773027529] [2021-06-05 14:43:46,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773027529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:46,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:46,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:46,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790042392] [2021-06-05 14:43:46,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:46,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:46,595 INFO L87 Difference]: Start difference. First operand 1023 states and 3551 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,109 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-06-05 14:43:47,364 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 85 [2021-06-05 14:43:47,594 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 60 [2021-06-05 14:43:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:47,623 INFO L93 Difference]: Finished difference Result 1261 states and 4188 transitions. [2021-06-05 14:43:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:47,626 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 14:43:47,626 INFO L226 Difference]: Without dead ends: 1249 [2021-06-05 14:43:47,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-05 14:43:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1020. [2021-06-05 14:43:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.4739941118743864) internal successors, (3540), 1019 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 14:43:47,637 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 14:43:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:47,638 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 14:43:47,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 14:43:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:47,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:47,639 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:47,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:47,839 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash 542769874, now seen corresponding path program 764 times [2021-06-05 14:43:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:47,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420476966] [2021-06-05 14:43:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:47,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420476966] [2021-06-05 14:43:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420476966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109460200] [2021-06-05 14:43:47,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:48,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:48,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:48,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:48,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:48,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,451 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:43:48,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_952 vanished before elimination [2021-06-05 14:43:48,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:48,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:43:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109460200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:48,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:48,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:48,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898472163] [2021-06-05 14:43:48,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:48,525 INFO L87 Difference]: Start difference. First operand 1020 states and 3540 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,012 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-05 14:43:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:49,200 INFO L93 Difference]: Finished difference Result 1375 states and 4464 transitions. [2021-06-05 14:43:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:49,203 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 14:43:49,203 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 14:43:49,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 14:43:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1028. [2021-06-05 14:43:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.4819863680623175) internal successors, (3576), 1027 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3576 transitions. [2021-06-05 14:43:49,215 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3576 transitions. Word has length 22 [2021-06-05 14:43:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3576 transitions. [2021-06-05 14:43:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3576 transitions. [2021-06-05 14:43:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:49,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:49,217 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:49,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10270 [2021-06-05 14:43:49,417 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash -951137848, now seen corresponding path program 765 times [2021-06-05 14:43:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:49,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765389491] [2021-06-05 14:43:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765389491] [2021-06-05 14:43:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765389491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676157680] [2021-06-05 14:43:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:49,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:49,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:43:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-06-05 14:43:49,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,026 INFO L628 ElimStorePlain]: treesize reduction 59, result has 37.9 percent of original size [2021-06-05 14:43:50,027 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:50,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:50,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:124, output treesize:36 [2021-06-05 14:43:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:50,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676157680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:50,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:50,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642006976] [2021-06-05 14:43:50,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:50,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:50,108 INFO L87 Difference]: Start difference. First operand 1028 states and 3576 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,624 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-06-05 14:43:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:50,924 INFO L93 Difference]: Finished difference Result 1408 states and 4527 transitions. [2021-06-05 14:43:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:50,926 INFO L225 Difference]: With dead ends: 1408 [2021-06-05 14:43:50,926 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 14:43:50,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:43:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 14:43:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1025. [2021-06-05 14:43:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.4814453125) internal successors, (3565), 1024 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3565 transitions. [2021-06-05 14:43:50,939 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3565 transitions. Word has length 22 [2021-06-05 14:43:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:50,940 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3565 transitions. [2021-06-05 14:43:50,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3565 transitions. [2021-06-05 14:43:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:50,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:50,941 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:51,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10293,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:51,141 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1294170312, now seen corresponding path program 766 times [2021-06-05 14:43:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047642512] [2021-06-05 14:43:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:51,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:51,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047642512] [2021-06-05 14:43:51,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047642512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:51,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725640949] [2021-06-05 14:43:51,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:51,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:51,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:51,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:51,798 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:43:51,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-06-05 14:43:51,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:51,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:43:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725640949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:51,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:51,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993505383] [2021-06-05 14:43:51,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:51,874 INFO L87 Difference]: Start difference. First operand 1025 states and 3565 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,337 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2021-06-05 14:43:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:52,557 INFO L93 Difference]: Finished difference Result 1373 states and 4461 transitions. [2021-06-05 14:43:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:52,559 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 14:43:52,559 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 14:43:52,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 14:43:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1021. [2021-06-05 14:43:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.4754901960784315) internal successors, (3545), 1020 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3545 transitions. [2021-06-05 14:43:52,572 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3545 transitions. Word has length 22 [2021-06-05 14:43:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:52,572 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3545 transitions. [2021-06-05 14:43:52,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3545 transitions. [2021-06-05 14:43:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:52,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:52,574 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:52,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 795 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10313 [2021-06-05 14:43:52,774 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1314906840, now seen corresponding path program 767 times [2021-06-05 14:43:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603650149] [2021-06-05 14:43:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:52,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603650149] [2021-06-05 14:43:52,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603650149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333107493] [2021-06-05 14:43:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:53,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:53,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:53,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:53,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333107493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:53,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:53,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 14:43:53,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842977461] [2021-06-05 14:43:53,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:43:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:43:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:53,288 INFO L87 Difference]: Start difference. First operand 1021 states and 3545 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:53,806 INFO L93 Difference]: Finished difference Result 1353 states and 4428 transitions. [2021-06-05 14:43:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:53,808 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 14:43:53,809 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 14:43:53,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:43:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 14:43:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1020. [2021-06-05 14:43:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.4739941118743864) internal successors, (3540), 1019 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 14:43:53,821 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 14:43:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:53,821 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 14:43:53,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 14:43:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:53,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:53,822 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:54,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10329,796 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:54,023 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash -703950776, now seen corresponding path program 768 times [2021-06-05 14:43:54,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:54,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731378748] [2021-06-05 14:43:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:54,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731378748] [2021-06-05 14:43:54,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731378748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175962111] [2021-06-05 14:43:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:54,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:54,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175962111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:54,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931665114] [2021-06-05 14:43:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:54,674 INFO L87 Difference]: Start difference. First operand 1020 states and 3540 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,175 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 14:43:55,443 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 14:43:55,648 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-05 14:43:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:55,673 INFO L93 Difference]: Finished difference Result 1252 states and 4164 transitions. [2021-06-05 14:43:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:55,675 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 14:43:55,675 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 14:43:55,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1035.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 14:43:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1022. [2021-06-05 14:43:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.472086190009794) internal successors, (3545), 1021 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3545 transitions. [2021-06-05 14:43:55,687 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3545 transitions. Word has length 22 [2021-06-05 14:43:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:55,687 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3545 transitions. [2021-06-05 14:43:55,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3545 transitions. [2021-06-05 14:43:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:55,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:55,688 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:55,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10342 [2021-06-05 14:43:55,888 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash 47449662, now seen corresponding path program 769 times [2021-06-05 14:43:55,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:55,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098795193] [2021-06-05 14:43:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:56,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098795193] [2021-06-05 14:43:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098795193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566710891] [2021-06-05 14:43:56,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:56,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:56,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:56,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,549 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:43:56,549 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:56,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:56,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:43:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:56,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566710891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:56,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:56,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050547561] [2021-06-05 14:43:56,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:56,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:56,593 INFO L87 Difference]: Start difference. First operand 1022 states and 3545 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,085 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2021-06-05 14:43:57,306 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2021-06-05 14:43:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:57,426 INFO L93 Difference]: Finished difference Result 1254 states and 4171 transitions. [2021-06-05 14:43:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:57,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:57,428 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:43:57,428 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:43:57,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 872.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:43:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:43:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1020. [2021-06-05 14:43:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.4739941118743864) internal successors, (3540), 1019 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 14:43:57,440 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 14:43:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:57,440 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 14:43:57,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 14:43:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:57,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:57,441 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:57,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 798 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10363 [2021-06-05 14:43:57,642 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2085868842, now seen corresponding path program 770 times [2021-06-05 14:43:57,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:57,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230202675] [2021-06-05 14:43:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:57,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230202675] [2021-06-05 14:43:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230202675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022802927] [2021-06-05 14:43:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:57,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:57,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:58,140 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:43:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:58,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022802927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:58,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:58,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:58,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881357109] [2021-06-05 14:43:58,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:58,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:58,333 INFO L87 Difference]: Start difference. First operand 1020 states and 3540 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:58,712 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-05 14:43:58,884 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2021-06-05 14:43:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:59,054 INFO L93 Difference]: Finished difference Result 1275 states and 4220 transitions. [2021-06-05 14:43:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:59,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:43:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:59,056 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 14:43:59,056 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:43:59,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 825.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:43:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1030. [2021-06-05 14:43:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.477162293488824) internal successors, (3578), 1029 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3578 transitions. [2021-06-05 14:43:59,068 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3578 transitions. Word has length 22 [2021-06-05 14:43:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:59,068 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3578 transitions. [2021-06-05 14:43:59,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3578 transitions. [2021-06-05 14:43:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:43:59,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:59,070 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:59,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10388 [2021-06-05 14:43:59,270 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash 715190732, now seen corresponding path program 771 times [2021-06-05 14:43:59,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:59,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962166141] [2021-06-05 14:43:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:59,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:59,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962166141] [2021-06-05 14:43:59,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962166141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:59,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871696215] [2021-06-05 14:43:59,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:59,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:43:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871696215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:43:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542079826] [2021-06-05 14:43:59,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:59,915 INFO L87 Difference]: Start difference. First operand 1030 states and 3578 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,298 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 14:44:00,474 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 14:44:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:00,652 INFO L93 Difference]: Finished difference Result 1281 states and 4227 transitions. [2021-06-05 14:44:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:00,654 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 14:44:00,654 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:44:00,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 784.2ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:44:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1027. [2021-06-05 14:44:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.4766081871345027) internal successors, (3567), 1026 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3567 transitions. [2021-06-05 14:44:00,666 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3567 transitions. Word has length 22 [2021-06-05 14:44:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:00,666 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3567 transitions. [2021-06-05 14:44:00,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3567 transitions. [2021-06-05 14:44:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:00,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:00,667 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:00,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10403,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:00,868 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1253046310, now seen corresponding path program 772 times [2021-06-05 14:44:00,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:00,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979217331] [2021-06-05 14:44:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:00,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:00,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979217331] [2021-06-05 14:44:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979217331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:00,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725810798] [2021-06-05 14:44:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:01,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:01,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:01,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725810798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:01,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:01,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:01,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453181914] [2021-06-05 14:44:01,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:01,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:01,542 INFO L87 Difference]: Start difference. First operand 1027 states and 3567 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:01,927 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 14:44:02,102 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 14:44:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:02,311 INFO L93 Difference]: Finished difference Result 1245 states and 4145 transitions. [2021-06-05 14:44:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:02,313 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 14:44:02,313 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 14:44:02,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 14:44:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1024. [2021-06-05 14:44:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.4760508308895406) internal successors, (3556), 1023 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3556 transitions. [2021-06-05 14:44:02,325 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3556 transitions. Word has length 22 [2021-06-05 14:44:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:02,325 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3556 transitions. [2021-06-05 14:44:02,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3556 transitions. [2021-06-05 14:44:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:02,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:02,326 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:02,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10427,801 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:02,527 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash 746700044, now seen corresponding path program 773 times [2021-06-05 14:44:02,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:02,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668643617] [2021-06-05 14:44:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:02,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668643617] [2021-06-05 14:44:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668643617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829573587] [2021-06-05 14:44:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:02,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:03,042 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:44:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:03,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829573587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:03,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:03,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:03,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798331891] [2021-06-05 14:44:03,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:03,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:03,253 INFO L87 Difference]: Start difference. First operand 1024 states and 3556 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:03,647 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 14:44:03,827 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-06-05 14:44:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:04,054 INFO L93 Difference]: Finished difference Result 1242 states and 4134 transitions. [2021-06-05 14:44:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:04,056 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 14:44:04,056 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 14:44:04,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 14:44:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1021. [2021-06-05 14:44:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.4754901960784315) internal successors, (3545), 1020 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3545 transitions. [2021-06-05 14:44:04,067 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3545 transitions. Word has length 22 [2021-06-05 14:44:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:04,067 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3545 transitions. [2021-06-05 14:44:04,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3545 transitions. [2021-06-05 14:44:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:04,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:04,068 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:04,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:04,269 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:04,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1544553652, now seen corresponding path program 774 times [2021-06-05 14:44:04,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:04,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804027113] [2021-06-05 14:44:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:04,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:04,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804027113] [2021-06-05 14:44:04,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804027113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:04,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54365063] [2021-06-05 14:44:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:04,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:44:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:04,801 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:44:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:05,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54365063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:05,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:05,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:05,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761628329] [2021-06-05 14:44:05,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:05,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:05,040 INFO L87 Difference]: Start difference. First operand 1021 states and 3545 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,422 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 14:44:05,583 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 14:44:05,785 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-05 14:44:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:05,879 INFO L93 Difference]: Finished difference Result 1284 states and 4242 transitions. [2021-06-05 14:44:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:05,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:05,881 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 14:44:05,881 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 14:44:05,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 14:44:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1028. [2021-06-05 14:44:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.4780915287244403) internal successors, (3572), 1027 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3572 transitions. [2021-06-05 14:44:05,893 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3572 transitions. Word has length 22 [2021-06-05 14:44:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:05,893 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3572 transitions. [2021-06-05 14:44:05,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3572 transitions. [2021-06-05 14:44:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:05,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:05,894 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-06-05 14:44:06,095 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1256505922, now seen corresponding path program 775 times [2021-06-05 14:44:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:06,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58797361] [2021-06-05 14:44:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:06,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58797361] [2021-06-05 14:44:06,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58797361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503893958] [2021-06-05 14:44:06,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:06,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:06,624 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:44:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:06,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503893958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:06,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:06,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:06,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879197620] [2021-06-05 14:44:06,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:06,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:06,866 INFO L87 Difference]: Start difference. First operand 1028 states and 3572 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,267 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 14:44:07,425 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 14:44:07,617 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2021-06-05 14:44:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:07,721 INFO L93 Difference]: Finished difference Result 1290 states and 4249 transitions. [2021-06-05 14:44:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:07,723 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 14:44:07,723 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 14:44:07,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 950.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 14:44:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1025. [2021-06-05 14:44:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.4775390625) internal successors, (3561), 1024 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3561 transitions. [2021-06-05 14:44:07,735 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3561 transitions. Word has length 22 [2021-06-05 14:44:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3561 transitions. [2021-06-05 14:44:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3561 transitions. [2021-06-05 14:44:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:07,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:07,736 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:07,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10494,804 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:07,937 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1794361500, now seen corresponding path program 776 times [2021-06-05 14:44:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:07,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394884244] [2021-06-05 14:44:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:08,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394884244] [2021-06-05 14:44:08,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394884244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998997398] [2021-06-05 14:44:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:08,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:08,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998997398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:08,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:08,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:08,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337498023] [2021-06-05 14:44:08,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:08,651 INFO L87 Difference]: Start difference. First operand 1025 states and 3561 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,047 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-05 14:44:09,406 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-06-05 14:44:09,574 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2021-06-05 14:44:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:09,601 INFO L93 Difference]: Finished difference Result 1254 states and 4167 transitions. [2021-06-05 14:44:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:09,603 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:44:09,603 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 14:44:09,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 14:44:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1022. [2021-06-05 14:44:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.476983349657199) internal successors, (3550), 1021 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3550 transitions. [2021-06-05 14:44:09,620 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3550 transitions. Word has length 22 [2021-06-05 14:44:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:09,620 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3550 transitions. [2021-06-05 14:44:09,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3550 transitions. [2021-06-05 14:44:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:09,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:09,622 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:09,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10518,805 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:09,822 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 274023446, now seen corresponding path program 777 times [2021-06-05 14:44:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:09,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493979681] [2021-06-05 14:44:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:09,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493979681] [2021-06-05 14:44:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493979681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389655082] [2021-06-05 14:44:09,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:10,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:44:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:10,576 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1011, v_prenex_1013, v_prenex_1012, v_prenex_1006, v_prenex_1005, v_prenex_1008], 1=[v_prenex_1015, nondet_0, v_prenex_1007]} [2021-06-05 14:44:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:10,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:10,710 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 14:44:10,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:10,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:10,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:10,839 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 14:44:10,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:10,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:10,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:10,978 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 14:44:10,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:10,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:10,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,103 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 14:44:11,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:11,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,225 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 14:44:11,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:11,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,346 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 14:44:11,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,357 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 14:44:11,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 14:44:11,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,472 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 14:44:11,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 14:44:11,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,606 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 14:44:11,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 14:44:11,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:11,721 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 14:44:11,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:11,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 9 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:44:11,726 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:160 [2021-06-05 14:44:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:11,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389655082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:11,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:11,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:44:11,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941800199] [2021-06-05 14:44:11,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:44:11,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:44:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:11,913 INFO L87 Difference]: Start difference. First operand 1022 states and 3550 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,280 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 14:44:12,485 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2021-06-05 14:44:12,742 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-06-05 14:44:12,944 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2021-06-05 14:44:13,218 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2021-06-05 14:44:13,459 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-05 14:44:13,726 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-06-05 14:44:13,998 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-05 14:44:14,175 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-05 14:44:14,367 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2021-06-05 14:44:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:14,397 INFO L93 Difference]: Finished difference Result 2126 states and 6556 transitions. [2021-06-05 14:44:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:14,400 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 14:44:14,400 INFO L226 Difference]: Without dead ends: 2084 [2021-06-05 14:44:14,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2562.1ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:44:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-06-05 14:44:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1039. [2021-06-05 14:44:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 3.505780346820809) internal successors, (3639), 1038 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3639 transitions. [2021-06-05 14:44:14,416 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3639 transitions. Word has length 22 [2021-06-05 14:44:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:14,416 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 3639 transitions. [2021-06-05 14:44:14,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3639 transitions. [2021-06-05 14:44:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:14,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:14,423 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:14,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10536,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:14,624 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1219884276, now seen corresponding path program 778 times [2021-06-05 14:44:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:14,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192793551] [2021-06-05 14:44:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:14,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:14,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192793551] [2021-06-05 14:44:14,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192793551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:14,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637749419] [2021-06-05 14:44:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:14,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:14,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:15,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:15,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:15,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:15,234 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:44:15,234 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:15,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:15,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:44:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637749419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:15,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:15,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:15,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974544564] [2021-06-05 14:44:15,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:15,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:15,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:15,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:15,307 INFO L87 Difference]: Start difference. First operand 1039 states and 3639 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:15,681 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-06-05 14:44:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:16,026 INFO L93 Difference]: Finished difference Result 1387 states and 4523 transitions. [2021-06-05 14:44:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:16,029 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 14:44:16,029 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 14:44:16,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 14:44:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1040. [2021-06-05 14:44:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.51106833493744) internal successors, (3648), 1039 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3648 transitions. [2021-06-05 14:44:16,041 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3648 transitions. Word has length 22 [2021-06-05 14:44:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:16,042 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3648 transitions. [2021-06-05 14:44:16,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3648 transitions. [2021-06-05 14:44:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:16,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:16,043 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:16,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10557 [2021-06-05 14:44:16,243 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1025423884, now seen corresponding path program 779 times [2021-06-05 14:44:16,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:16,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32398202] [2021-06-05 14:44:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:16,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:16,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32398202] [2021-06-05 14:44:16,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32398202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:16,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780195938] [2021-06-05 14:44:16,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:16,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:16,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:16,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:16,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:16,922 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 14:44:16,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1027 vanished before elimination [2021-06-05 14:44:16,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:16,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:44:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:16,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780195938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:16,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:16,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777828707] [2021-06-05 14:44:16,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:16,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:16,999 INFO L87 Difference]: Start difference. First operand 1040 states and 3648 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,376 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 14:44:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:17,735 INFO L93 Difference]: Finished difference Result 1373 states and 4500 transitions. [2021-06-05 14:44:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:17,737 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 14:44:17,737 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 14:44:17,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 14:44:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1036. [2021-06-05 14:44:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.5053140096618356) internal successors, (3628), 1035 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3628 transitions. [2021-06-05 14:44:17,757 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3628 transitions. Word has length 22 [2021-06-05 14:44:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:17,757 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3628 transitions. [2021-06-05 14:44:17,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3628 transitions. [2021-06-05 14:44:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:17,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:17,758 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:17,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10575 [2021-06-05 14:44:17,958 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1046160412, now seen corresponding path program 780 times [2021-06-05 14:44:17,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:17,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085292548] [2021-06-05 14:44:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:18,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:18,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085292548] [2021-06-05 14:44:18,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085292548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:18,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052851354] [2021-06-05 14:44:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:18,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:18,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:18,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:18,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:18,544 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:44:18,544 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:18,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:18,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:44:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:18,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052851354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:18,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:18,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:18,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062673448] [2021-06-05 14:44:18,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:18,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:18,618 INFO L87 Difference]: Start difference. First operand 1036 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:18,972 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 14:44:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:19,333 INFO L93 Difference]: Finished difference Result 1353 states and 4467 transitions. [2021-06-05 14:44:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:19,335 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 14:44:19,335 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 14:44:19,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 14:44:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1035. [2021-06-05 14:44:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 3.503868471953578) internal successors, (3623), 1034 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3623 transitions. [2021-06-05 14:44:19,348 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3623 transitions. Word has length 22 [2021-06-05 14:44:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:19,348 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 3623 transitions. [2021-06-05 14:44:19,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3623 transitions. [2021-06-05 14:44:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:19,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:19,349 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:19,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:19,550 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -972697204, now seen corresponding path program 781 times [2021-06-05 14:44:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:19,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004055879] [2021-06-05 14:44:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:19,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004055879] [2021-06-05 14:44:19,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004055879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498938798] [2021-06-05 14:44:19,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:20,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498938798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:20,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:20,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:20,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690819076] [2021-06-05 14:44:20,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:20,274 INFO L87 Difference]: Start difference. First operand 1035 states and 3623 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:20,669 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 14:44:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:21,140 INFO L93 Difference]: Finished difference Result 1260 states and 4223 transitions. [2021-06-05 14:44:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:21,142 INFO L225 Difference]: With dead ends: 1260 [2021-06-05 14:44:21,142 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:44:21,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:44:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1037. [2021-06-05 14:44:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.501930501930502) internal successors, (3628), 1036 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3628 transitions. [2021-06-05 14:44:21,153 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3628 transitions. Word has length 22 [2021-06-05 14:44:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:21,154 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3628 transitions. [2021-06-05 14:44:21,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3628 transitions. [2021-06-05 14:44:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:21,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:21,155 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:21,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10627,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:21,355 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -221296766, now seen corresponding path program 782 times [2021-06-05 14:44:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:21,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363908624] [2021-06-05 14:44:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:21,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363908624] [2021-06-05 14:44:21,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363908624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:21,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865552755] [2021-06-05 14:44:21,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:21,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:21,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:21,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:21,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:21,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:21,991 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:44:21,991 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:21,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:21,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:44:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:22,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865552755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:22,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:22,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238414076] [2021-06-05 14:44:22,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:22,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:22,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:22,036 INFO L87 Difference]: Start difference. First operand 1037 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,415 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 14:44:22,576 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 14:44:22,774 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-06-05 14:44:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:22,885 INFO L93 Difference]: Finished difference Result 1262 states and 4230 transitions. [2021-06-05 14:44:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:22,887 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 14:44:22,887 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 14:44:22,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 14:44:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1034. [2021-06-05 14:44:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.5024201355275895) internal successors, (3618), 1033 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 14:44:22,899 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 14:44:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:22,899 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 14:44:22,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 14:44:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:22,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:22,900 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:23,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10646,811 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:23,100 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 867226140, now seen corresponding path program 783 times [2021-06-05 14:44:23,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252328073] [2021-06-05 14:44:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252328073] [2021-06-05 14:44:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252328073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322697176] [2021-06-05 14:44:23,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:23,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:23,592 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:44:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322697176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:23,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:23,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392629566] [2021-06-05 14:44:23,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:23,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:23,767 INFO L87 Difference]: Start difference. First operand 1034 states and 3618 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,161 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-06-05 14:44:24,364 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 14:44:24,527 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-06-05 14:44:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:24,599 INFO L93 Difference]: Finished difference Result 1246 states and 4183 transitions. [2021-06-05 14:44:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:24,601 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 14:44:24,601 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 14:44:24,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 14:44:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1036. [2021-06-05 14:44:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.5004830917874394) internal successors, (3623), 1035 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3623 transitions. [2021-06-05 14:44:24,613 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3623 transitions. Word has length 22 [2021-06-05 14:44:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:24,613 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3623 transitions. [2021-06-05 14:44:24,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3623 transitions. [2021-06-05 14:44:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:24,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:24,614 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:24,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10676 [2021-06-05 14:44:24,814 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1609164058, now seen corresponding path program 784 times [2021-06-05 14:44:24,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:24,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352684333] [2021-06-05 14:44:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:24,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352684333] [2021-06-05 14:44:24,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352684333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:24,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309026266] [2021-06-05 14:44:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:25,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:25,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:25,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309026266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:25,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:25,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:25,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872231074] [2021-06-05 14:44:25,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:25,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:25,487 INFO L87 Difference]: Start difference. First operand 1036 states and 3623 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,871 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-05 14:44:26,076 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2021-06-05 14:44:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:26,279 INFO L93 Difference]: Finished difference Result 1242 states and 4175 transitions. [2021-06-05 14:44:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:26,281 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 14:44:26,281 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 14:44:26,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 14:44:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1038. [2021-06-05 14:44:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.498553519768563) internal successors, (3628), 1037 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3628 transitions. [2021-06-05 14:44:26,293 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3628 transitions. Word has length 22 [2021-06-05 14:44:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:26,293 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3628 transitions. [2021-06-05 14:44:26,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3628 transitions. [2021-06-05 14:44:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:26,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:26,295 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:26,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 813 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10688 [2021-06-05 14:44:26,495 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:26,495 INFO L82 PathProgramCache]: Analyzing trace with hash -857763620, now seen corresponding path program 785 times [2021-06-05 14:44:26,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:26,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843199302] [2021-06-05 14:44:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:26,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843199302] [2021-06-05 14:44:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843199302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685457453] [2021-06-05 14:44:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:26,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:26,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:27,011 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:44:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:27,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,184 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:44:27,184 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:27,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:27,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:44:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:27,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685457453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:27,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:27,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 14:44:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301256137] [2021-06-05 14:44:27,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:27,231 INFO L87 Difference]: Start difference. First operand 1038 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,610 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-05 14:44:27,806 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-06-05 14:44:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:27,996 INFO L93 Difference]: Finished difference Result 1244 states and 4182 transitions. [2021-06-05 14:44:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:44:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:27,998 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 14:44:27,998 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 14:44:27,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 871.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:44:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 14:44:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1034. [2021-06-05 14:44:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.5024201355275895) internal successors, (3618), 1033 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 14:44:28,010 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 14:44:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 14:44:28,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 14:44:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:28,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:28,011 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:28,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10707 [2021-06-05 14:44:28,211 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash -789062727, now seen corresponding path program 786 times [2021-06-05 14:44:28,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:28,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955932364] [2021-06-05 14:44:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955932364] [2021-06-05 14:44:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955932364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639456461] [2021-06-05 14:44:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:28,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:28,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:44:28,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:28,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:28,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:28,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:44:28,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:28,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:28,570 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 14:44:28,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:28,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-06-05 14:44:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639456461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:28,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 14:44:28,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245620553] [2021-06-05 14:44:28,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:28,611 INFO L87 Difference]: Start difference. First operand 1034 states and 3618 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:28,902 INFO L93 Difference]: Finished difference Result 1400 states and 4652 transitions. [2021-06-05 14:44:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:44:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:28,904 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 14:44:28,904 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 14:44:28,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 14:44:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1034. [2021-06-05 14:44:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.5024201355275895) internal successors, (3618), 1033 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 14:44:28,916 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 14:44:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:28,916 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 14:44:28,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 14:44:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:28,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:28,918 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:29,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10739,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:29,118 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash 436796254, now seen corresponding path program 787 times [2021-06-05 14:44:29,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:29,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241286] [2021-06-05 14:44:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:29,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:29,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241286] [2021-06-05 14:44:29,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:29,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37408008] [2021-06-05 14:44:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:29,590 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1057, nondet_0], 1=[v_prenex_1061, v_prenex_1059]} [2021-06-05 14:44:29,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:29,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:29,646 INFO L628 ElimStorePlain]: treesize reduction 61, result has 49.6 percent of original size [2021-06-05 14:44:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:29,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:29,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:29,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1061 vanished before elimination [2021-06-05 14:44:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:29,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:29,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:29,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:29,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:29,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:29,697 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:126, output treesize:6 [2021-06-05 14:44:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:29,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37408008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:29,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:29,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:29,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454930896] [2021-06-05 14:44:29,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:29,740 INFO L87 Difference]: Start difference. First operand 1034 states and 3618 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:30,117 INFO L93 Difference]: Finished difference Result 1351 states and 4478 transitions. [2021-06-05 14:44:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:30,119 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 14:44:30,119 INFO L226 Difference]: Without dead ends: 1351 [2021-06-05 14:44:30,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-05 14:44:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1044. [2021-06-05 14:44:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.4937679769894534) internal successors, (3644), 1043 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3644 transitions. [2021-06-05 14:44:30,131 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3644 transitions. Word has length 22 [2021-06-05 14:44:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:30,131 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3644 transitions. [2021-06-05 14:44:30,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3644 transitions. [2021-06-05 14:44:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:30,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:30,132 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:30,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 816 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10756 [2021-06-05 14:44:30,332 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1595439784, now seen corresponding path program 788 times [2021-06-05 14:44:30,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:30,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918374848] [2021-06-05 14:44:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:30,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918374848] [2021-06-05 14:44:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918374848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072967918] [2021-06-05 14:44:30,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:30,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:30,754 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1064, nondet_0], 3=[v_prenex_1067]} [2021-06-05 14:44:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:30,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,794 INFO L628 ElimStorePlain]: treesize reduction 35, result has 58.3 percent of original size [2021-06-05 14:44:30,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:30,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:30,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:30,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:30,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:30,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:30,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:89, output treesize:9 [2021-06-05 14:44:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:30,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072967918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:30,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:30,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936414158] [2021-06-05 14:44:30,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:30,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:30,879 INFO L87 Difference]: Start difference. First operand 1044 states and 3644 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:31,265 INFO L93 Difference]: Finished difference Result 1403 states and 4599 transitions. [2021-06-05 14:44:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:31,267 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 14:44:31,267 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 14:44:31,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 14:44:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1047. [2021-06-05 14:44:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.494263862332696) internal successors, (3655), 1046 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3655 transitions. [2021-06-05 14:44:31,280 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3655 transitions. Word has length 22 [2021-06-05 14:44:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:31,280 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3655 transitions. [2021-06-05 14:44:31,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3655 transitions. [2021-06-05 14:44:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:31,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:31,281 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:31,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10781,817 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:31,482 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash 101532062, now seen corresponding path program 789 times [2021-06-05 14:44:31,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:31,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759346122] [2021-06-05 14:44:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:31,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759346122] [2021-06-05 14:44:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759346122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578421223] [2021-06-05 14:44:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:31,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:44:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:31,934 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1069, nondet_0], 1=[v_prenex_1071, v_prenex_1074]} [2021-06-05 14:44:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:31,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,990 INFO L628 ElimStorePlain]: treesize reduction 61, result has 49.6 percent of original size [2021-06-05 14:44:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:31,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:32,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1071 vanished before elimination [2021-06-05 14:44:32,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:32,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:32,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:32,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:32,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:32,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:32,040 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:126, output treesize:6 [2021-06-05 14:44:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:32,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578421223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:32,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:32,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406596535] [2021-06-05 14:44:32,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:32,093 INFO L87 Difference]: Start difference. First operand 1047 states and 3655 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:32,447 INFO L93 Difference]: Finished difference Result 1360 states and 4496 transitions. [2021-06-05 14:44:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:32,449 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 14:44:32,449 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 14:44:32,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 14:44:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1039. [2021-06-05 14:44:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 3.498073217726397) internal successors, (3631), 1038 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3631 transitions. [2021-06-05 14:44:32,461 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3631 transitions. Word has length 22 [2021-06-05 14:44:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:32,461 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 3631 transitions. [2021-06-05 14:44:32,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3631 transitions. [2021-06-05 14:44:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:32,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:32,462 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:32,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10796 [2021-06-05 14:44:32,663 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1605435924, now seen corresponding path program 790 times [2021-06-05 14:44:32,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:32,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119806498] [2021-06-05 14:44:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:32,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119806498] [2021-06-05 14:44:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119806498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121910994] [2021-06-05 14:44:32,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:32,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:32,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:32,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:32,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121910994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:33,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:33,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829065756] [2021-06-05 14:44:33,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:33,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:33,233 INFO L87 Difference]: Start difference. First operand 1039 states and 3631 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:33,703 INFO L93 Difference]: Finished difference Result 1303 states and 4331 transitions. [2021-06-05 14:44:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:33,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:33,705 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 14:44:33,705 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 14:44:33,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 14:44:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1045. [2021-06-05 14:44:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4990421455938696) internal successors, (3653), 1044 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3653 transitions. [2021-06-05 14:44:33,717 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3653 transitions. Word has length 22 [2021-06-05 14:44:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:33,717 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3653 transitions. [2021-06-05 14:44:33,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3653 transitions. [2021-06-05 14:44:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:33,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:33,719 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:33,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 819 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10821 [2021-06-05 14:44:33,919 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1195623650, now seen corresponding path program 791 times [2021-06-05 14:44:33,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:33,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774064725] [2021-06-05 14:44:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:34,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:34,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774064725] [2021-06-05 14:44:34,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774064725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:34,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74094771] [2021-06-05 14:44:34,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:34,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:34,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74094771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:34,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:34,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217215505] [2021-06-05 14:44:34,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:34,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:34,474 INFO L87 Difference]: Start difference. First operand 1045 states and 3653 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:34,983 INFO L93 Difference]: Finished difference Result 1309 states and 4338 transitions. [2021-06-05 14:44:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:34,984 INFO L225 Difference]: With dead ends: 1309 [2021-06-05 14:44:34,984 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 14:44:34,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 14:44:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1042. [2021-06-05 14:44:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.4985590778097984) internal successors, (3642), 1041 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3642 transitions. [2021-06-05 14:44:34,997 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3642 transitions. Word has length 22 [2021-06-05 14:44:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:34,997 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3642 transitions. [2021-06-05 14:44:34,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3642 transitions. [2021-06-05 14:44:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:34,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:34,998 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:35,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10838,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:35,198 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1733479228, now seen corresponding path program 792 times [2021-06-05 14:44:35,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:35,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604218072] [2021-06-05 14:44:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604218072] [2021-06-05 14:44:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604218072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323757417] [2021-06-05 14:44:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:35,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:44:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:35,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323757417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:35,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:35,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:35,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607979557] [2021-06-05 14:44:35,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:35,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:35,811 INFO L87 Difference]: Start difference. First operand 1042 states and 3642 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,324 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 14:44:36,514 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 14:44:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:36,539 INFO L93 Difference]: Finished difference Result 1267 states and 4243 transitions. [2021-06-05 14:44:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:36,541 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 14:44:36,541 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 14:44:36,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 14:44:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1034. [2021-06-05 14:44:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.5024201355275895) internal successors, (3618), 1033 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 14:44:36,552 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 14:44:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:36,553 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 14:44:36,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 14:44:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:36,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:36,554 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:36,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10852 [2021-06-05 14:44:36,754 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash -31263719, now seen corresponding path program 793 times [2021-06-05 14:44:36,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:36,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643533987] [2021-06-05 14:44:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:36,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:36,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643533987] [2021-06-05 14:44:36,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643533987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:36,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668365214] [2021-06-05 14:44:36,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:37,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:44:37,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,116 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-06-05 14:44:37,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:37,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:37,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:37,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:37,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:37,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,183 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.5 percent of original size [2021-06-05 14:44:37,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:37,184 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-06-05 14:44:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:37,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668365214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:37,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 14:44:37,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278901020] [2021-06-05 14:44:37,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:37,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:37,252 INFO L87 Difference]: Start difference. First operand 1034 states and 3618 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:37,663 INFO L93 Difference]: Finished difference Result 1611 states and 5227 transitions. [2021-06-05 14:44:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:44:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:37,665 INFO L225 Difference]: With dead ends: 1611 [2021-06-05 14:44:37,665 INFO L226 Difference]: Without dead ends: 1541 [2021-06-05 14:44:37,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-05 14:44:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1034. [2021-06-05 14:44:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.5024201355275895) internal successors, (3618), 1033 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 14:44:37,678 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 14:44:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 14:44:37,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 14:44:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:37,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:37,680 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:37,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10878,822 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:37,880 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash 978111444, now seen corresponding path program 794 times [2021-06-05 14:44:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:37,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138307643] [2021-06-05 14:44:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:37,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:37,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138307643] [2021-06-05 14:44:37,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138307643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288717636] [2021-06-05 14:44:37,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:38,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:38,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:38,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:38,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:38,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:38,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:38,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,437 INFO L628 ElimStorePlain]: treesize reduction 39, result has 72.9 percent of original size [2021-06-05 14:44:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:38,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:38,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:38,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:38,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:38,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:38,531 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:162, output treesize:29 [2021-06-05 14:44:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:38,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288717636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:38,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:38,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291912450] [2021-06-05 14:44:38,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:38,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:38,605 INFO L87 Difference]: Start difference. First operand 1034 states and 3618 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:38,953 INFO L93 Difference]: Finished difference Result 1608 states and 5214 transitions. [2021-06-05 14:44:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:38,955 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 14:44:38,955 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 14:44:38,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 14:44:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1046. [2021-06-05 14:44:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.5014354066985645) internal successors, (3659), 1045 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3659 transitions. [2021-06-05 14:44:38,969 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3659 transitions. Word has length 22 [2021-06-05 14:44:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:38,970 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3659 transitions. [2021-06-05 14:44:38,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3659 transitions. [2021-06-05 14:44:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:38,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:38,971 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:39,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10896,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,171 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2136754974, now seen corresponding path program 795 times [2021-06-05 14:44:39,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:39,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147733969] [2021-06-05 14:44:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:39,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147733969] [2021-06-05 14:44:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147733969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451941905] [2021-06-05 14:44:39,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:44:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:39,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:39,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:44:39,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:39,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:39,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:39,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:39,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:39,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:39,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,737 INFO L628 ElimStorePlain]: treesize reduction 15, result has 80.0 percent of original size [2021-06-05 14:44:39,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:39,738 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 14:44:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:39,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451941905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:39,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:44:39,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560937728] [2021-06-05 14:44:39,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:44:39,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:44:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:44:39,816 INFO L87 Difference]: Start difference. First operand 1046 states and 3659 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:40,202 INFO L93 Difference]: Finished difference Result 1649 states and 5306 transitions. [2021-06-05 14:44:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:40,205 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 14:44:40,205 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 14:44:40,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 14:44:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1052. [2021-06-05 14:44:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.50523311132255) internal successors, (3684), 1051 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3684 transitions. [2021-06-05 14:44:40,219 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3684 transitions. Word has length 22 [2021-06-05 14:44:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:40,219 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3684 transitions. [2021-06-05 14:44:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3684 transitions. [2021-06-05 14:44:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:40,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:40,221 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:40,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10938,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:40,421 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash 642847252, now seen corresponding path program 796 times [2021-06-05 14:44:40,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:40,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941352362] [2021-06-05 14:44:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:40,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941352362] [2021-06-05 14:44:40,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941352362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337399283] [2021-06-05 14:44:40,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:40,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:40,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:40,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:40,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:40,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,957 INFO L628 ElimStorePlain]: treesize reduction 54, result has 56.5 percent of original size [2021-06-05 14:44:40,958 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1100 vanished before elimination [2021-06-05 14:44:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:40,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:40,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:40,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:40,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:40,989 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 14:44:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:41,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337399283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:41,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:41,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944509484] [2021-06-05 14:44:41,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:41,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:41,066 INFO L87 Difference]: Start difference. First operand 1052 states and 3684 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:41,438 INFO L93 Difference]: Finished difference Result 1603 states and 5195 transitions. [2021-06-05 14:44:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:41,440 INFO L225 Difference]: With dead ends: 1603 [2021-06-05 14:44:41,440 INFO L226 Difference]: Without dead ends: 1597 [2021-06-05 14:44:41,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-06-05 14:44:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1044. [2021-06-05 14:44:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5091083413231066) internal successors, (3660), 1043 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3660 transitions. [2021-06-05 14:44:41,454 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3660 transitions. Word has length 22 [2021-06-05 14:44:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:41,454 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3660 transitions. [2021-06-05 14:44:41,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3660 transitions. [2021-06-05 14:44:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:41,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:41,456 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:41,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 825 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10960 [2021-06-05 14:44:41,656 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1388623929, now seen corresponding path program 797 times [2021-06-05 14:44:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:41,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138102715] [2021-06-05 14:44:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:41,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138102715] [2021-06-05 14:44:41,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138102715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:41,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748058868] [2021-06-05 14:44:41,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:41,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:41,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:41,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:41,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:41,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:41,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:41,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:41,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:41,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:41,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:42,023 INFO L628 ElimStorePlain]: treesize reduction 43, result has 46.3 percent of original size [2021-06-05 14:44:42,023 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:42,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:42,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:21 [2021-06-05 14:44:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:42,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748058868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:42,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:42,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 14:44:42,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066575492] [2021-06-05 14:44:42,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:44:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:44:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:44:42,103 INFO L87 Difference]: Start difference. First operand 1044 states and 3660 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:42,680 INFO L93 Difference]: Finished difference Result 1731 states and 5513 transitions. [2021-06-05 14:44:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:44:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:42,682 INFO L225 Difference]: With dead ends: 1731 [2021-06-05 14:44:42,682 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 14:44:42,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 14:44:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1044. [2021-06-05 14:44:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5004793863854267) internal successors, (3651), 1043 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3651 transitions. [2021-06-05 14:44:42,697 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3651 transitions. Word has length 22 [2021-06-05 14:44:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:42,697 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3651 transitions. [2021-06-05 14:44:42,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3651 transitions. [2021-06-05 14:44:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:42,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:42,698 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:42,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10999,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:42,899 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1498278754, now seen corresponding path program 798 times [2021-06-05 14:44:42,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:42,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490087663] [2021-06-05 14:44:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:43,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490087663] [2021-06-05 14:44:43,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490087663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177239276] [2021-06-05 14:44:43,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:43,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:43,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:43,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:43,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:43,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:43,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,458 INFO L628 ElimStorePlain]: treesize reduction 35, result has 69.8 percent of original size [2021-06-05 14:44:43,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1104 vanished before elimination [2021-06-05 14:44:43,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:43,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:43,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:43,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:43,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:43,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 14:44:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177239276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:43,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:43,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323134064] [2021-06-05 14:44:43,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:43,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:43,579 INFO L87 Difference]: Start difference. First operand 1044 states and 3651 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:43,931 INFO L93 Difference]: Finished difference Result 1514 states and 4939 transitions. [2021-06-05 14:44:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:43,933 INFO L225 Difference]: With dead ends: 1514 [2021-06-05 14:44:43,934 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 14:44:43,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 14:44:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1040. [2021-06-05 14:44:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.496631376323388) internal successors, (3633), 1039 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3633 transitions. [2021-06-05 14:44:43,947 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3633 transitions. Word has length 22 [2021-06-05 14:44:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:43,947 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3633 transitions. [2021-06-05 14:44:43,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3633 transitions. [2021-06-05 14:44:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:43,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:43,948 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:44,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11029,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:44,149 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash 134772638, now seen corresponding path program 799 times [2021-06-05 14:44:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:44,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697844316] [2021-06-05 14:44:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:44,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697844316] [2021-06-05 14:44:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697844316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484408677] [2021-06-05 14:44:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:44,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:44,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:44,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:44:44,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:44,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:44,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:44,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:44,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:44,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:44,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:44,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:44,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:44,784 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:162, output treesize:29 [2021-06-05 14:44:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:44,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484408677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:44,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:44,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:44,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683769440] [2021-06-05 14:44:44,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:44,880 INFO L87 Difference]: Start difference. First operand 1040 states and 3633 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:45,409 INFO L93 Difference]: Finished difference Result 1537 states and 5023 transitions. [2021-06-05 14:44:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:44:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:45,412 INFO L225 Difference]: With dead ends: 1537 [2021-06-05 14:44:45,412 INFO L226 Difference]: Without dead ends: 1537 [2021-06-05 14:44:45,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-05 14:44:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1043. [2021-06-05 14:44:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 3.5009596928982725) internal successors, (3648), 1042 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 3648 transitions. [2021-06-05 14:44:45,426 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 3648 transitions. Word has length 22 [2021-06-05 14:44:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:45,427 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 3648 transitions. [2021-06-05 14:44:45,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 3648 transitions. [2021-06-05 14:44:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:45,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:45,428 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:45,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11066,828 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:45,628 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1822364318, now seen corresponding path program 800 times [2021-06-05 14:44:45,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:45,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845300132] [2021-06-05 14:44:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:45,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845300132] [2021-06-05 14:44:45,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845300132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445741686] [2021-06-05 14:44:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:45,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:45,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:46,091 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1121, v_prenex_1116], 1=[v_prenex_1119, v_prenex_1124, nondet_0]} [2021-06-05 14:44:46,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:46,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,192 INFO L628 ElimStorePlain]: treesize reduction 103, result has 49.5 percent of original size [2021-06-05 14:44:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1116 vanished before elimination [2021-06-05 14:44:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1119 vanished before elimination [2021-06-05 14:44:46,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:46,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:46,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:46,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:46,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:46,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:46,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:46,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:46,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:210, output treesize:27 [2021-06-05 14:44:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:46,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445741686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:46,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:46,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:46,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523172865] [2021-06-05 14:44:46,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:46,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:46,363 INFO L87 Difference]: Start difference. First operand 1043 states and 3648 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:46,716 INFO L93 Difference]: Finished difference Result 1451 states and 4813 transitions. [2021-06-05 14:44:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:46,718 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 14:44:46,719 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 14:44:46,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 14:44:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1034. [2021-06-05 14:44:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.493707647628267) internal successors, (3609), 1033 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 14:44:46,732 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 14:44:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:46,732 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 14:44:46,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 14:44:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:46,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:46,733 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:46,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11109,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:46,933 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash -533414228, now seen corresponding path program 801 times [2021-06-05 14:44:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:46,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069552514] [2021-06-05 14:44:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:47,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069552514] [2021-06-05 14:44:47,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069552514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136271987] [2021-06-05 14:44:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:47,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:44:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:47,328 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1125, nondet_0], 1=[v_prenex_1127], 6=[v_prenex_1131]} [2021-06-05 14:44:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:47,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:47,411 INFO L628 ElimStorePlain]: treesize reduction 98, result has 50.5 percent of original size [2021-06-05 14:44:47,412 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:44:47,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1127 vanished before elimination [2021-06-05 14:44:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:47,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 14:44:47,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:47,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-05 14:44:47,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:47,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:47,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:47,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:204, output treesize:53 [2021-06-05 14:44:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:47,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136271987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:47,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:47,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:47,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815837528] [2021-06-05 14:44:47,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:47,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:47,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:47,601 INFO L87 Difference]: Start difference. First operand 1034 states and 3609 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:48,241 INFO L93 Difference]: Finished difference Result 1615 states and 5211 transitions. [2021-06-05 14:44:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:44:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:48,244 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 14:44:48,244 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 14:44:48,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:44:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 14:44:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1037. [2021-06-05 14:44:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.494208494208494) internal successors, (3620), 1036 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 14:44:48,258 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 14:44:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:48,258 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 14:44:48,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 14:44:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:48,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:48,259 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:48,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 830 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11145 [2021-06-05 14:44:48,460 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2027321950, now seen corresponding path program 802 times [2021-06-05 14:44:48,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:48,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101201325] [2021-06-05 14:44:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:48,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:48,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101201325] [2021-06-05 14:44:48,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101201325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:48,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606562822] [2021-06-05 14:44:48,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:48,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:48,914 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1134, v_prenex_1136, nondet_0], 1=[v_prenex_1141, v_prenex_1144, v_prenex_1138]} [2021-06-05 14:44:48,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:48,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,059 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 14:44:49,060 INFO L628 ElimStorePlain]: treesize reduction 73, result has 68.3 percent of original size [2021-06-05 14:44:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:49,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:49,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:49,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:49,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:49,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:49,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:49,250 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1144 vanished before elimination [2021-06-05 14:44:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:49,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:49,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:49,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:49,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:49,311 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 15 variables, input treesize:236, output treesize:29 [2021-06-05 14:44:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606562822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:49,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:49,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818603030] [2021-06-05 14:44:49,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:49,400 INFO L87 Difference]: Start difference. First operand 1037 states and 3620 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:49,821 INFO L93 Difference]: Finished difference Result 1563 states and 5086 transitions. [2021-06-05 14:44:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:49,823 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 14:44:49,823 INFO L226 Difference]: Without dead ends: 1557 [2021-06-05 14:44:49,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-05 14:44:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1038. [2021-06-05 14:44:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.4995178399228544) internal successors, (3629), 1037 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3629 transitions. [2021-06-05 14:44:49,837 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3629 transitions. Word has length 22 [2021-06-05 14:44:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:49,837 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3629 transitions. [2021-06-05 14:44:49,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3629 transitions. [2021-06-05 14:44:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:49,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:49,838 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:50,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11158 [2021-06-05 14:44:50,039 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 217986210, now seen corresponding path program 803 times [2021-06-05 14:44:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:50,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057949585] [2021-06-05 14:44:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:50,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057949585] [2021-06-05 14:44:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057949585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108123456] [2021-06-05 14:44:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:50,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:50,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:50,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-06-05 14:44:50,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:50,586 INFO L628 ElimStorePlain]: treesize reduction 21, result has 80.7 percent of original size [2021-06-05 14:44:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:50,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:50,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:50,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:50,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:50,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:50,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:50,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:50,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:50,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:50,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:50,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:50,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 14:44:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:50,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108123456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:50,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690296257] [2021-06-05 14:44:50,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:50,747 INFO L87 Difference]: Start difference. First operand 1038 states and 3629 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:51,289 INFO L93 Difference]: Finished difference Result 1602 states and 5179 transitions. [2021-06-05 14:44:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:44:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:51,292 INFO L225 Difference]: With dead ends: 1602 [2021-06-05 14:44:51,292 INFO L226 Difference]: Without dead ends: 1602 [2021-06-05 14:44:51,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-06-05 14:44:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1037. [2021-06-05 14:44:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.498069498069498) internal successors, (3624), 1036 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3624 transitions. [2021-06-05 14:44:51,306 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3624 transitions. Word has length 22 [2021-06-05 14:44:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3624 transitions. [2021-06-05 14:44:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3624 transitions. [2021-06-05 14:44:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:51,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:51,307 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:51,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11191,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:51,507 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1510328610, now seen corresponding path program 804 times [2021-06-05 14:44:51,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:51,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323750569] [2021-06-05 14:44:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:51,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323750569] [2021-06-05 14:44:51,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323750569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923113584] [2021-06-05 14:44:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:51,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:51,932 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1155, nondet_0], 3=[v_prenex_1153], 6=[v_prenex_1160]} [2021-06-05 14:44:51,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:51,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,033 INFO L628 ElimStorePlain]: treesize reduction 88, result has 57.7 percent of original size [2021-06-05 14:44:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:52,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:52,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:52,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:52,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:52,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:52,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:52,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:44:52,173 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 13 variables, input treesize:227, output treesize:38 [2021-06-05 14:44:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:52,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923113584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:52,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:52,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:52,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420158736] [2021-06-05 14:44:52,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:52,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:52,269 INFO L87 Difference]: Start difference. First operand 1037 states and 3624 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:52,682 INFO L93 Difference]: Finished difference Result 1542 states and 5053 transitions. [2021-06-05 14:44:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:52,684 INFO L225 Difference]: With dead ends: 1542 [2021-06-05 14:44:52,684 INFO L226 Difference]: Without dead ends: 1542 [2021-06-05 14:44:52,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-06-05 14:44:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1034. [2021-06-05 14:44:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.493707647628267) internal successors, (3609), 1033 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 14:44:52,698 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 14:44:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:52,698 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 14:44:52,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 14:44:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:52,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:52,699 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:52,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11229,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:52,900 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash 238722738, now seen corresponding path program 805 times [2021-06-05 14:44:52,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:52,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379069807] [2021-06-05 14:44:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:53,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:53,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379069807] [2021-06-05 14:44:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379069807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:53,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706369118] [2021-06-05 14:44:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:53,309 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1170, v_prenex_1166, v_prenex_1168], 6=[v_prenex_1173, nondet_0]} [2021-06-05 14:44:53,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:53,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,481 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2021-06-05 14:44:53,481 INFO L628 ElimStorePlain]: treesize reduction 41, result has 83.9 percent of original size [2021-06-05 14:44:53,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:44:53,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:53,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:53,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:53,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:53,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:44:53,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:53,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:53,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:53,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:53,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:53,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 5 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:44:53,826 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:261, output treesize:63 [2021-06-05 14:44:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706369118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:53,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:53,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:53,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365576349] [2021-06-05 14:44:53,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:53,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:53,921 INFO L87 Difference]: Start difference. First operand 1034 states and 3609 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:54,386 INFO L93 Difference]: Finished difference Result 1496 states and 4904 transitions. [2021-06-05 14:44:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:44:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:54,388 INFO L225 Difference]: With dead ends: 1496 [2021-06-05 14:44:54,388 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:44:54,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:44:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:44:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1036. [2021-06-05 14:44:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.4917874396135264) internal successors, (3614), 1035 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3614 transitions. [2021-06-05 14:44:54,401 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3614 transitions. Word has length 22 [2021-06-05 14:44:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:54,401 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3614 transitions. [2021-06-05 14:44:54,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3614 transitions. [2021-06-05 14:44:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:54,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:54,403 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:54,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 834 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11246 [2021-06-05 14:44:54,603 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1676701188, now seen corresponding path program 806 times [2021-06-05 14:44:54,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:54,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997448419] [2021-06-05 14:44:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:54,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997448419] [2021-06-05 14:44:54,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997448419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:54,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501480954] [2021-06-05 14:44:54,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:54,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:54,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:55,025 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1176, v_prenex_1178], 3=[nondet_0], 6=[v_prenex_1183]} [2021-06-05 14:44:55,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:44:55,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,144 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 14:44:55,144 INFO L628 ElimStorePlain]: treesize reduction 107, result has 51.6 percent of original size [2021-06-05 14:44:55,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1178 vanished before elimination [2021-06-05 14:44:55,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:55,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:55,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:44:55,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:44:55,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:55,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:44:55,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:227, output treesize:38 [2021-06-05 14:44:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:55,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501480954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:55,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954597612] [2021-06-05 14:44:55,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:55,342 INFO L87 Difference]: Start difference. First operand 1036 states and 3614 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:55,709 INFO L93 Difference]: Finished difference Result 1467 states and 4850 transitions. [2021-06-05 14:44:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:55,711 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 14:44:55,711 INFO L226 Difference]: Without dead ends: 1467 [2021-06-05 14:44:55,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-06-05 14:44:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1034. [2021-06-05 14:44:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.493707647628267) internal successors, (3609), 1033 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 14:44:55,724 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 14:44:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:55,724 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 14:44:55,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 14:44:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:55,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:55,725 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:55,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11263,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:55,926 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1518664734, now seen corresponding path program 807 times [2021-06-05 14:44:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2956914] [2021-06-05 14:44:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:56,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2956914] [2021-06-05 14:44:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2956914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090972526] [2021-06-05 14:44:56,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:56,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:44:56,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090972526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:56,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:56,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710588768] [2021-06-05 14:44:56,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:56,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:56,541 INFO L87 Difference]: Start difference. First operand 1034 states and 3609 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:56,946 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 14:44:57,177 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2021-06-05 14:44:57,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:57,266 INFO L93 Difference]: Finished difference Result 1308 states and 4337 transitions. [2021-06-05 14:44:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:57,269 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 14:44:57,269 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:44:57,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 753.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:44:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1040. [2021-06-05 14:44:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.494706448508181) internal successors, (3631), 1039 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3631 transitions. [2021-06-05 14:44:57,282 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3631 transitions. Word has length 22 [2021-06-05 14:44:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:57,282 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3631 transitions. [2021-06-05 14:44:57,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3631 transitions. [2021-06-05 14:44:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:57,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:57,283 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:57,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11280,836 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:57,483 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash 24757012, now seen corresponding path program 808 times [2021-06-05 14:44:57,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:57,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759850345] [2021-06-05 14:44:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:57,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:57,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759850345] [2021-06-05 14:44:57,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759850345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:57,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033490405] [2021-06-05 14:44:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:57,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:57,995 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 14:44:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033490405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:58,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:58,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:58,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865105898] [2021-06-05 14:44:58,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:58,151 INFO L87 Difference]: Start difference. First operand 1040 states and 3631 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:58,562 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 14:44:58,791 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2021-06-05 14:44:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:58,888 INFO L93 Difference]: Finished difference Result 1314 states and 4344 transitions. [2021-06-05 14:44:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:44:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:44:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:58,890 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 14:44:58,890 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:44:58,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 834.2ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:44:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1037. [2021-06-05 14:44:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.494208494208494) internal successors, (3620), 1036 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 14:44:58,902 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 14:44:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:58,902 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 14:44:58,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 14:44:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:44:58,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:58,904 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:59,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11298 [2021-06-05 14:44:59,104 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 562612590, now seen corresponding path program 809 times [2021-06-05 14:44:59,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:59,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405655519] [2021-06-05 14:44:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:59,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405655519] [2021-06-05 14:44:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405655519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890273885] [2021-06-05 14:44:59,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:59,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:44:59,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:59,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890273885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:59,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:59,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:44:59,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095938615] [2021-06-05 14:44:59,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:59,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:59,798 INFO L87 Difference]: Start difference. First operand 1037 states and 3620 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,208 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 14:45:00,394 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 14:45:00,564 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2021-06-05 14:45:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:00,586 INFO L93 Difference]: Finished difference Result 1278 states and 4262 transitions. [2021-06-05 14:45:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:00,588 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:45:00,588 INFO L226 Difference]: Without dead ends: 1266 [2021-06-05 14:45:00,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-06-05 14:45:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1034. [2021-06-05 14:45:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.493707647628267) internal successors, (3609), 1033 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 14:45:00,600 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 14:45:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:00,600 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 14:45:00,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 14:45:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:00,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:00,601 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:00,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11313 [2021-06-05 14:45:00,801 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash -957725464, now seen corresponding path program 810 times [2021-06-05 14:45:00,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:00,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809685451] [2021-06-05 14:45:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:00,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:00,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809685451] [2021-06-05 14:45:00,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809685451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45701409] [2021-06-05 14:45:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:01,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:01,297 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 14:45:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:01,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:01,406 INFO L628 ElimStorePlain]: treesize reduction 117, result has 18.8 percent of original size [2021-06-05 14:45:01,407 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1204 vanished before elimination [2021-06-05 14:45:01,407 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:45:01,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:01,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:175, output treesize:27 [2021-06-05 14:45:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45701409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:01,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:01,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:01,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014952127] [2021-06-05 14:45:01,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:01,476 INFO L87 Difference]: Start difference. First operand 1034 states and 3609 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:01,855 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-06-05 14:45:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:02,019 INFO L93 Difference]: Finished difference Result 1407 states and 4578 transitions. [2021-06-05 14:45:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:02,021 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 14:45:02,021 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 14:45:02,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 14:45:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1037. [2021-06-05 14:45:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.494208494208494) internal successors, (3620), 1036 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 14:45:02,042 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 14:45:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:02,043 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 14:45:02,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 14:45:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:02,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:02,044 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:02,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11339,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,244 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1843334110, now seen corresponding path program 811 times [2021-06-05 14:45:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863432777] [2021-06-05 14:45:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:02,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863432777] [2021-06-05 14:45:02,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863432777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609351657] [2021-06-05 14:45:02,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:02,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:02,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:02,887 INFO L628 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2021-06-05 14:45:02,887 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:45:02,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:02,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:111, output treesize:27 [2021-06-05 14:45:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609351657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488904835] [2021-06-05 14:45:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:02,953 INFO L87 Difference]: Start difference. First operand 1037 states and 3620 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,368 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 14:45:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:03,556 INFO L93 Difference]: Finished difference Result 1412 states and 4583 transitions. [2021-06-05 14:45:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:03,558 INFO L225 Difference]: With dead ends: 1412 [2021-06-05 14:45:03,558 INFO L226 Difference]: Without dead ends: 1406 [2021-06-05 14:45:03,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-06-05 14:45:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1038. [2021-06-05 14:45:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.4995178399228544) internal successors, (3629), 1037 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3629 transitions. [2021-06-05 14:45:03,571 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3629 transitions. Word has length 22 [2021-06-05 14:45:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:03,571 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3629 transitions. [2021-06-05 14:45:03,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3629 transitions. [2021-06-05 14:45:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:03,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:03,573 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:03,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 840 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11353 [2021-06-05 14:45:03,773 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -206325026, now seen corresponding path program 812 times [2021-06-05 14:45:03,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:03,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569965826] [2021-06-05 14:45:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:03,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:03,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569965826] [2021-06-05 14:45:03,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569965826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:03,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092260920] [2021-06-05 14:45:03,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:04,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:04,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:04,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:04,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,359 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 14:45:04,359 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:45:04,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:04,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 14:45:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092260920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:04,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:04,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 14:45:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848544462] [2021-06-05 14:45:04,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:45:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:45:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:45:04,442 INFO L87 Difference]: Start difference. First operand 1038 states and 3629 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:04,866 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 14:45:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:05,188 INFO L93 Difference]: Finished difference Result 1394 states and 4539 transitions. [2021-06-05 14:45:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:05,190 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 14:45:05,190 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 14:45:05,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 14:45:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1037. [2021-06-05 14:45:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.498069498069498) internal successors, (3624), 1036 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3624 transitions. [2021-06-05 14:45:05,204 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3624 transitions. Word has length 22 [2021-06-05 14:45:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:05,204 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3624 transitions. [2021-06-05 14:45:05,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3624 transitions. [2021-06-05 14:45:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:05,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:05,205 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:05,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 841 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11388 [2021-06-05 14:45:05,422 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1086017374, now seen corresponding path program 813 times [2021-06-05 14:45:05,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:05,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750066364] [2021-06-05 14:45:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:05,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750066364] [2021-06-05 14:45:05,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750066364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342519897] [2021-06-05 14:45:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:05,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:06,047 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 14:45:06,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:06,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:06,257 INFO L628 ElimStorePlain]: treesize reduction 223, result has 10.8 percent of original size [2021-06-05 14:45:06,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1221 vanished before elimination [2021-06-05 14:45:06,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1224 vanished before elimination [2021-06-05 14:45:06,257 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:45:06,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1217 vanished before elimination [2021-06-05 14:45:06,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1227 vanished before elimination [2021-06-05 14:45:06,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:06,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 18 variables, input treesize:281, output treesize:27 [2021-06-05 14:45:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342519897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:06,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:06,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:06,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556382630] [2021-06-05 14:45:06,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:06,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:06,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:06,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:06,332 INFO L87 Difference]: Start difference. First operand 1037 states and 3624 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,720 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-06-05 14:45:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:06,880 INFO L93 Difference]: Finished difference Result 1340 states and 4432 transitions. [2021-06-05 14:45:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:06,883 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 14:45:06,883 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:45:06,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:45:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1034. [2021-06-05 14:45:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.493707647628267) internal successors, (3609), 1033 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 14:45:06,896 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 14:45:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:06,896 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 14:45:06,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 14:45:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:06,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:06,897 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:07,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11409,842 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:07,098 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash -185588498, now seen corresponding path program 814 times [2021-06-05 14:45:07,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:07,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362724209] [2021-06-05 14:45:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:07,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362724209] [2021-06-05 14:45:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362724209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618350683] [2021-06-05 14:45:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:07,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:07,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:07,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:07,632 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 14:45:07,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:07,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:07,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:07,725 INFO L628 ElimStorePlain]: treesize reduction 95, result has 22.1 percent of original size [2021-06-05 14:45:07,725 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:45:07,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:07,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:154, output treesize:27 [2021-06-05 14:45:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618350683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:07,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:07,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481484765] [2021-06-05 14:45:07,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:07,796 INFO L87 Difference]: Start difference. First operand 1034 states and 3609 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,226 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 14:45:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:08,527 INFO L93 Difference]: Finished difference Result 1383 states and 4521 transitions. [2021-06-05 14:45:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:45:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:08,530 INFO L225 Difference]: With dead ends: 1383 [2021-06-05 14:45:08,530 INFO L226 Difference]: Without dead ends: 1377 [2021-06-05 14:45:08,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-05 14:45:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1036. [2021-06-05 14:45:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.4917874396135264) internal successors, (3614), 1035 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3614 transitions. [2021-06-05 14:45:08,543 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3614 transitions. Word has length 22 [2021-06-05 14:45:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:08,543 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3614 transitions. [2021-06-05 14:45:08,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3614 transitions. [2021-06-05 14:45:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:08,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:08,544 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:08,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11423,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:08,745 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2101012424, now seen corresponding path program 815 times [2021-06-05 14:45:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:08,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721868254] [2021-06-05 14:45:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:08,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721868254] [2021-06-05 14:45:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721868254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961030819] [2021-06-05 14:45:08,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:09,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:09,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:45:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:45:09,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:09,368 INFO L628 ElimStorePlain]: treesize reduction 53, result has 33.8 percent of original size [2021-06-05 14:45:09,368 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1239 vanished before elimination [2021-06-05 14:45:09,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:09,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:111, output treesize:27 [2021-06-05 14:45:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:09,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961030819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:09,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:09,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847761925] [2021-06-05 14:45:09,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:09,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:09,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:09,437 INFO L87 Difference]: Start difference. First operand 1036 states and 3614 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:09,837 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 14:45:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:10,002 INFO L93 Difference]: Finished difference Result 1354 states and 4467 transitions. [2021-06-05 14:45:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:10,004 INFO L225 Difference]: With dead ends: 1354 [2021-06-05 14:45:10,004 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 14:45:10,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 14:45:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1033. [2021-06-05 14:45:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.492248062015504) internal successors, (3604), 1032 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3604 transitions. [2021-06-05 14:45:10,017 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3604 transitions. Word has length 22 [2021-06-05 14:45:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:10,017 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3604 transitions. [2021-06-05 14:45:10,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3604 transitions. [2021-06-05 14:45:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:10,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:10,018 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:10,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 844 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11437 [2021-06-05 14:45:10,219 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2090521182, now seen corresponding path program 816 times [2021-06-05 14:45:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:10,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561780130] [2021-06-05 14:45:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:10,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:10,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561780130] [2021-06-05 14:45:10,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561780130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:10,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532836531] [2021-06-05 14:45:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:10,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:45:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:10,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532836531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:10,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:10,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 14:45:10,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131110969] [2021-06-05 14:45:10,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:10,911 INFO L87 Difference]: Start difference. First operand 1033 states and 3604 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,356 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-06-05 14:45:11,581 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-06-05 14:45:11,756 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 58 [2021-06-05 14:45:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:11,779 INFO L93 Difference]: Finished difference Result 1268 states and 4233 transitions. [2021-06-05 14:45:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:45:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:45:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:11,781 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 14:45:11,781 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 14:45:11,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 969.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 14:45:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1035. [2021-06-05 14:45:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 3.490328820116054) internal successors, (3609), 1034 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3609 transitions. [2021-06-05 14:45:11,793 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3609 transitions. Word has length 22 [2021-06-05 14:45:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:11,793 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 3609 transitions. [2021-06-05 14:45:11,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3609 transitions. [2021-06-05 14:45:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:45:11,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:11,795 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-06-05 14:45:11,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11471,845 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:11,995 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1453045676, now seen corresponding path program 817 times [2021-06-05 14:45:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:11,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155883222] [2021-06-05 14:45:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-05 14:45:11,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824876576] [2021-06-05 14:45:11,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:45:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:12,169 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-05 14:45:12,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11484,846 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:12,369 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:45:12,371 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:45:12,372 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:45:12,372 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:45:12 BasicIcfg [2021-06-05 14:45:12,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:45:12,373 INFO L168 Benchmark]: Toolchain (without parser) took 897413.78 ms. Allocated memory was 373.3 MB in the beginning and 721.4 MB in the end (delta: 348.1 MB). Free memory was 352.5 MB in the beginning and 669.8 MB in the end (delta: -317.3 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 353.9 MB in the beginning and 353.8 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.53 ms. Allocated memory is still 373.3 MB. Free memory was 352.4 MB in the beginning and 351.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 349.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L168 Benchmark]: RCFGBuilder took 593.54 ms. Allocated memory is still 373.3 MB. Free memory was 349.8 MB in the beginning and 343.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L168 Benchmark]: TraceAbstraction took 896768.53 ms. Allocated memory was 373.3 MB in the beginning and 721.4 MB in the end (delta: 348.1 MB). Free memory was 343.1 MB in the beginning and 669.8 MB in the end (delta: -326.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-06-05 14:45:12,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 353.9 MB in the beginning and 353.8 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.53 ms. Allocated memory is still 373.3 MB. Free memory was 352.4 MB in the beginning and 351.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 349.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 593.54 ms. Allocated memory is still 373.3 MB. Free memory was 349.8 MB in the beginning and 343.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 896768.53 ms. Allocated memory was 373.3 MB in the beginning and 721.4 MB in the end (delta: 348.1 MB). Free memory was 343.1 MB in the beginning and 669.8 MB in the end (delta: -326.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 896684.6ms, OverallIterations: 846, TraceHistogramMax: 3, EmptinessCheckTime: 487.9ms, AutomataDifference: 392924.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45888 SDtfs, 88588 SDslu, 282160 SDs, 0 SdLazy, 319900 SolverSat, 7273 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 122312.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30285 GetRequests, 14090 SyntacticMatches, 649 SemanticMatches, 15546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48891 ImplicationChecksByTransitivity, 386226.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1052occurred in iteration=824, InterpolantAutomatonStates: 9334, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5000.2ms AutomataMinimizationTime, 845 MinimizatonAttempts, 193343 StatesRemovedByMinimization, 844 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4105.2ms SsaConstructionTime, 9295.1ms SatisfiabilityAnalysisTime, 247461.9ms InterpolantComputationTime, 34629 NumberOfCodeBlocks, 34623 NumberOfCodeBlocksAsserted, 2478 NumberOfCheckSat, 32940 ConstructedInterpolants, 1084 QuantifiedInterpolants, 333298 SizeOfPredicates, 7572 NumberOfNonLiveVariables, 80164 ConjunctsInSsa, 18261 ConjunctsInUnsatCore, 1689 InterpolantComputations, 3 PerfectInterpolantSequences, 2411/8772 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown